PDF malware analysis — malicious · 013376954b1044f5

MALICIOUS

PDF

76.4 KB Created: 2021-09-25 16:27:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25

MD5: 2e06cc0873c89c0d79743e30541bbd11 SHA-1: b317b4d2139ae2ab6563c985fa84c74cb79159ce SHA-256: 013376954b1044f54890cee98a94dc2fc44dcfc692b64802318ce63e4cebd376

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of embedded URLs, many of which are on disposable hosting, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the presence of numerous external links points towards an attempt to redirect the user to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9919

Heuristics 5

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://crewmak.ru/uplcv?utm_term=index+of+the+x+files+season+1 PDF link annotation
- https://literie-depot.fr/UserFiles/file/kewuwilerutanudenog.pdfIn PDF document text
- http://osteriadelcampanile.com/userfiles/files/23406180513.pdfIn PDF document text
- http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161352de90c6b2---jinafe.pdfIn PDF document text
- http://ephtour.com/FileData/ckfinder/files/20210913_6A34667A6BD4612F.pdfIn PDF document text
- http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c892b04973---25972699889.pdfIn PDF document text
- https://habibitours.net/ckfinder/userfiles/files/riwimunutiwididokedo.pdfIn PDF document text
- https://aiwatopup.com/ckfinder/userfiles/files/nodetexogezaxaralito.pdfIn PDF document text
- https://presstone.hu/userfiles/file/56108404192.pdfIn PDF document text
- https://adrfarysz.pl/userfiles/file/zuxaxojefelaxexabip.pdfIn PDF document text
- http://wangyiphk.com/userfiles/8714339810.pdfIn PDF document text
- http://ud2-140.com/files/25888828868.pdfIn PDF document text
- https://smilaxlabs.com/userfiles/files/jemakugipabalebolalatedi.pdfIn PDF document text
- https://osakaav.com/userfiles/files/63010254868.pdfIn PDF document text
- https://mytekas.com/UserFiles/file/lagozapok.pdfIn PDF document text
- http://commune-bourre.com/userfiles/file/vizafabomu.pdfIn PDF document text
- http://abwva.com/uploads/files/70250177668.pdfIn PDF document text
- http://fine-cottage.ru/userfiles/files/87139667484.pdfIn PDF document text
- http://coconut.hu/userfiles/file/17612588301.pdfIn PDF document text
- https://dazhonghua1688.com/ckfinder/userfiles/files/lamer.pdfIn PDF document text
- https://asiastudy.in/ckfinder/userfiles/files/53066265712.pdfIn PDF document text
- http://socukorglutamatmentesfuszer.hu/ckfinder/userfiles/files/xekiloj.pdfIn PDF document text
- http://statsale.com/data/upload/ck/files/17294407156.pdfIn PDF document text
- http://wskinbody.com/data/boardData/files/zodebitinuwezizizajifir.pdfIn PDF document text
- https://xn----7sbbg1ddpkdc.xn--j1amh/uploads/files/19781641195.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_off0000b1df.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB1DF	17188 bytes
SHA-256: `4050b2130102acc43d8a0b7bd8d64b9f39733f89b2f8a44c605c7b51ae02da69`
`font_01_sfnt_off0000ddd3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDDD3	16176 bytes
SHA-256: `d4e6f9d1c3c482647bfbb15ad61e93b6b5cbbc63bd1aea10020f41e347ab91b6`
`font_02_sfnt_off0000f386.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF386	10456 bytes
SHA-256: `df0c7721e1a5c6659544125dd8c2894e2225dd59ec604838cda15b7713d768a5`
`font_03_sfnt_off00010b43.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B43	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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