PDF malware analysis — malicious · 04f594cae2355550

MALICIOUS

PDF

88.0 KB Created: 2021-06-26 11:36:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: da4f4d304b83e8021ff49920f419755e SHA-1: b07da516e2489aeaf33ded788af631b7ce7d0829 SHA-256: 04f594cae2355550e091204d11de842c12e83b27191ce80f592f85bdca4a87b8

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting it functions as a link farm. The embedded URLs are likely intended to redirect users to malicious sites for phishing or further malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

Heuristics 6

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.
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 http://dienmaythanglong.org/uploads/files/68079452152.pdf In PDF document text
- http://crmrealty360degree.in/userfiles/file/gawadil.pdfIn PDF document text
- https://przyklejki.pl/userfiles/21816463296.pdfIn PDF document text
- http://lbhodgereunion.com/clients/3/38/38e1f81cb1ac74d12d86c8ba87866b9f/File/tatudasewaw.pdfIn PDF document text
- https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/qje2g943v9siqtq5p0luf5nou9/65529180575.pdfIn PDF document text
- http://plafondchauffant.fr//img/user/file/kujajuwosewi.pdfIn PDF document text
- https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b4b60c3ca3c---82818106870.pdfIn PDF document text
- https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee60af0d10---dasuzoxidomono.pdfIn PDF document text
- http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160744a2e181f4---leloserativej.pdfIn PDF document text
- https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/708bmcphs27dlgip8o0kaud4ev/20860784438.pdfIn PDF document text
- https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/c02ce1a25e16ba5b43c8019fead39009/riluxareborebil.pdfIn PDF document text
- https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160943a05216a4---rusowufisunurigew.pdfIn PDF document text
- http://accronline.com/userfiles/file/likavemunadamola.pdfIn PDF document text
- http://monroehighbeachreunion.com/clients/8/88/88bd109b8fc96949fe6caf7698e88fda/File/samugulir.pdfIn PDF document text
- https://aedwea.com/upload/foto/fimetipe.pdfIn PDF document text
- https://tonwen.org/userfiles/file/resak.pdfIn PDF document text
- http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/bd71add3ad1a78f07270f49c619a6095/11230079864.pdfIn PDF document text
- https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607772c5b9f81---legefijeranuse.pdfIn PDF document text
- http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a640d6b85c3---biruxunefalikeverimejow.pdfIn PDF document text
- https://allcreaturesinc.com/files/files/58737926313.pdfIn PDF document text
- https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/qd5mdql82p9oterj8bm7gllql3/14375633067.pdfIn PDF document text
- https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/58eb4377f4af2e45cc05128409186f78/69774077048.pdfIn PDF document text
- http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9b3b82f11---77116240730.pdfIn PDF document text
- http://kimandyoo.com/userfiles/file/4139835712.pdfIn PDF document text
- http://microlana.com/ckfinder/userfiles/files/valerofiveremaditupuninod.pdfIn PDF document text
- https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ad7ae37ac07---5224330471.pdfIn PDF document text
- http://beepost.vn/upload/userfiles/files/11983314515.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=2pac+ft+notorious+big+runnin+mp3+downloadPDF 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_off0000f1aa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF1AA	11352 bytes
SHA-256: `24f16b96b948c59caa3589a7bf75a7b6d881c797012ab182901aac92df8ed37f`
`font_01_sfnt_off00010c1c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10C1C	17924 bytes
SHA-256: `721caceeffbf32671d807b0ac5b720b005c81369e82d473100d4424bbddf0043`
`font_02_sfnt_off00013a4d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13A4D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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