PDF malware analysis — malicious · 637122b005caad3e

MALICIOUS

PDF

102.8 KB Created: 2021-09-03 02:33:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 8d32dee1f9e1d328ceeb014b9e593cc0 SHA-1: 8ac7ad9494d74a0a2f13235de3ca5a9f7d8f5f9f SHA-256: 637122b005caad3eda4f561d276582d8b0044348ba2919ff9e28773812b069cb

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to lead users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the link farm and the presence of embedded URLs are indicative of an attempt to lure users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9867

Heuristics 7

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
Urgency / deadline lure low SE_URGENCY_LURE

Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://giasusinhvien.net/upload/files/4788653584.pdf In PDF document text
- https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/9aff86be20322321ba1a55c18ec7ac29/wozimeminapupujunibiru.pdfIn PDF document text
- http://mtreurope.com/ckfinder/userfiles/files/sobagovatarironizenamir.pdfIn PDF document text
- http://designbeginnings.com/upload/file/zovorexa.pdfIn PDF document text
- https://zionapostolicministries.org/uploads/file/95313021500.pdfIn PDF document text
- https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/lqdna5sid2urgterc0upqr20st/68492059939.pdfIn PDF document text
- https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/1132813afc9dd5d8040aea9f5847661c/kowagib.pdfIn PDF document text
- https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16081969651fb4---87427747126.pdfIn PDF document text
- https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/47c932d9937b8eefdab5c2db5009ac89/50455630256.pdfIn PDF document text
- https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/i9rr3em2a5un1rgfl36jr5gdi5/wigikazogosazotusonoruraj.pdfIn PDF document text
- https://machinex-machines.com/UserFiles/File/23723676695.pdfIn PDF document text
- https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/5dbda51c078e422a0e8f679f76092e16/25089718781.pdfIn PDF document text
- https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b24d18cd5a1---43804921935.pdfIn PDF document text
- http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dcc73be8227---potewukelit.pdfIn PDF document text
- http://anshan56.cn/userfiles/file/1629938549902122140.pdfIn PDF document text
- http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4b4353d54---pegaxevafavegego.pdfIn PDF document text
- http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160910a84befb0---93312179245.pdfIn PDF document text
- http://doorsatyrau.com/ckfinder/userfiles/files/94865351449.pdfIn PDF document text
- https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dbe049bbaa---99573146121.pdfIn PDF document text
- http://robbinsfamilyhealthcare.com/clients/2/2c/2c787fa606fc56c3a3a24dfc5409695f/File/54462710373.pdfIn PDF document text
- http://terwaarde.be/ckfinder/userfiles/files/19931941344.pdfIn PDF document text
- http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4cd357b52b---namipolaropunexa.pdfIn PDF document text
- http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606eed37180b0---fedetibamewomoramarukixo.pdfIn PDF document text
- http://zgkimsteszew.pl/img/upload/files/mawagaliseludajakuj.pdfIn PDF document text
- http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd9bf0bd783---midozulopedepi.pdfIn PDF document text
- http://thuexe7cho.vn/upload/files/19861548062.pdfIn PDF document text
- https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/erjmnu51sc4kbb21paikhrd6fb/kokasemenuliwepal.pdfIn PDF document text
- https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/dtqvatg0pjqhg5t0rprh74sucp/vojexanozereregejipotu.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=definition+of+pastoral+care+pdfPDF link annotation
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00012d1b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12D1B	10616 bytes
SHA-256: `631dddc3c60f4a0a21c55b7ff7fd049ade1fda2a64734710114c83a1b3aa6c61`
`font_01_sfnt_off0001457b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1457B	18264 bytes
SHA-256: `295ffc23a9cbf4a7c7cd816392708547ff1da41ea6c26db4faae3471a31256dd`
`font_02_sfnt_off00017505.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x17505	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

Open this report in the interactive analyzer, or submit your own file for analysis.