Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0c8a12fef820935…

MALICIOUS

PDF

80.5 KB Created: 2021-09-10 10:35:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b4f407323e5f4717735303be5b886ce2 SHA-1: 75702f4cf5268bbe17a15a0a84b490ed42d56792 SHA-256: a0c8a12fef820935a23d39bc7cc3865713f18d9863cca7397c549741930c21ba
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The PDF contains numerous links, many pointing to disposable domains, and one URL specifically mentions 'pokemon gen 7 gba rom download' in its path, suggesting a lure to trick users into clicking malicious links. The document body is heavily obfuscated and unreadable, preventing further analysis of its direct content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://webbsoil.com/home/webb/public_html/ckfinder/userfiles/files/sixinatamamigitabez.pdf
    • http://h-p-n.fr/catalogue_dynamique/file/komibatunepeginigexi.pdf
    • https://ddnepal.com/assets/userfiles/files/kujebuwi.pdf
    • http://cgpreceptor.com/ckfinder/userfiles/files/32920140631.pdf
    • http://roocenter.ru/upload/file/66046181974.pdf
    • http://www.valathors.com/ckfinder/userfiles/files/16053507917.pdf
    • http://dtyxbpzx.com/filespath/files/20210908101119.pdf
    • http://kramnyca.info/img/upload/editor/file/24288633057.pdf
    • http://capri.lt/userfiles/files/tajeleterovajile.pdf
    • http://studiocariola.com/userfiles/files/tekenagosorulufikubifaf.pdf
    • https://areopag.ru/sites/default/files/uploads/tutulavefe.pdf
    • https://dpengineerindia.com/admin/userfiles/file/detesabolajiwuxovamumofag.pdf
    • https://kamarkosong.com/contents/files/9226578170.pdf
    • http://brandorbit.in/userfiles/file/lovokerosebiribadojowum.pdf
    • http://clingac.com/d/files/jademonemivudelekofagep.pdf
    • https://hahapediatric.com/uploads/files/202109032100205957.pdf
    • http://neapol-m.ru/usr/file/21403451374.pdf
    • http://etalentlink.com/uploadfile/file///2021090207032833.pdf
    • https://mumegram.com/userfiles/file/63118246148.pdf
    • http://vesimport.ru/userfiles/file/nowitonololezimizag.pdf
    • https://hw-power.com/uploads/ckfiles/files/6138f90751f84.pdf
    • https://kueapem.com/contents/files/lazopu.pdf
    • http://fullx.net/files/81820048845.pdf
    • http://wonderful-foods.net/userfiles/file/nafabikuderiwegufazo.pdf
    • http://1hozain.ru/files/userfiles/files/983853777.pdf
    • http://solar-makernavi.com/ckfinder/userfiles/files/finixasuz.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=pokemon+gen+7+gba+rom+download
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d41a.bin
ff858d9af90e943c054248ebcd4f5d1c8aec9e599bfe54070cebf20c82e907ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD41A 10604 bytes
font_01_sfnt_off0000ec32.bin
1cdefeeaa8c7aa3a65b174a6adcf1bf37d57e87b4ca2301736892e1408634fbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC32 18440 bytes
font_02_sfnt_off00011be0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE0 16792 bytes

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