PDF malware analysis — malicious · 38fbb0431b28ea46

MALICIOUS

PDF

91.4 KB Created: 2021-06-30 16:10:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15

MD5: b7f605422627633819d9c8e237b5cc15 SHA-1: 14dbe706f99693ef53dd0d3a61f90d4712c8f12a SHA-256: 38fbb0431b28ea46d96af5526f74aac8377a7dade390b633bb483e8f9a20c9f7

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised WordPress sites and other disposable hosting, forming a link farm likely designed to redirect users to malicious content or phishing pages. No scripts were extracted, but the overall structure and URL patterns strongly suggest a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9932

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 https://philabc.ru/uplcv?utm_term=since+for+present+perfect+continuous PDF link annotation
- https://groupunsur1.com/contents//files/zukas.pdfIn PDF document text
- https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f433278d7---84511756265.pdfIn PDF document text
- https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/b9bedef6b116e5f90c4da15f5193027d/sepinez.pdfIn PDF document text
- https://africanresearchcenter.com/userfiles/file/wojimilafalitolujimud.pdfIn PDF document text
- http://christopherspubandgrille.com/userfiles/files/6411107049.pdfIn PDF document text
- http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/25jer504vstlb7j4m3rqv81kp7/givilizixijasasevevawinu.pdfIn PDF document text
- http://loveperfectionschool.com/upload/file/devila.pdfIn PDF document text
- https://lifesmart.ro/ckfinder/userfiles/files/94734673310.pdfIn PDF document text
- https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/a28545d9730a8f3628aff119de41ac73/jivigamatigemikupa.pdfIn PDF document text
- https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/0632ded1ceac52943f9aba0cf9887157/78755700406.pdfIn PDF document text
- https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/mllca405f5p5qqf50n816asln4/6096910466.pdfIn PDF document text
- http://elm3rad.com/file/41116901009.pdfIn PDF document text
- http://merwepizza.com/upload/file/60840942202.pdfIn PDF document text
- http://panziofabian.hu/fck_kepek/81644566059.pdfIn PDF document text
- http://andlupa.com/userfiles/file/luvebadufebezobe.pdfIn PDF document text
- http://allycatering.com/userfiles/koxevebitenifalado.pdfIn PDF document text
- https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/er1l21gvvi7jh3t2she9rr2hd4/wazusutebesonevefavazo.pdfIn PDF document text
- http://naturallabs.de/userfiles/file/wugibipi.pdfIn PDF document text
- http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/e775d2a90373c153a85d0fb116ed8e84/kalazeketodoxew.pdfIn PDF document text
- http://yachtandgulet.com/userfiles/file/44640283675.pdfIn PDF document text
- http://pk.mo/userfiles/file/wubalupixefuwepukebisope.pdfIn PDF document text
- https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/1ff42a25977d53f0072efd4ba2c64085/nediwo.pdfIn PDF document text
- http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/74f716eb28b13c723102dc45d44c6ea2/2201388760.pdfIn PDF document text
- 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e8e9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE8E9	18448 bytes
SHA-256: `80bd239e1b6d8e0252f0313a5c6a2c608d209454211d186ca3b1a1cf8ccc5b5e`
`font_01_sfnt_off00011800.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11800	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00013017.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13017	10440 bytes
SHA-256: `ed9b9db19efb2e719660a8d933a37f517653cc65bcb4c1386dd2cffd801817ba`
`font_03_sfnt_off000147dd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x147DD	16348 bytes
SHA-256: `f2b04fa57bd472238a9abe18ca68f80992fbfe74bfa3f5f6e132e685f126a8fb`

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