Malicious PDF — malware analysis report

Static analysis result for SHA-256 19652393954fb478…

MALICIOUS

PDF

85.9 KB Created: 2021-04-01 23:39:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: c790af5480e3db81abf52be8634a04cb SHA-1: 85abbb3f38a7772bdf73546ca377b7064949de64 SHA-256: 19652393954fb478cacd804c55b3c3ddb58ab3b376b6bc822a10dede454a108d
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous links to external websites, many of which are hosted on disposable domains, indicating a link farm or phishing attempt. The presence of a specific game mod in the URL suggests a lure to attract users interested in that content. ClamAV detection and ML classification confirm the malicious nature of the file, likely serving as a dropper or redirector to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://mezovuduw.ru/wix?keyword=injustice+gods+among+us+apk+mod+3.3.1 PDF link annotation
    • http://jovijufojalu.22web.org/avatar_comics_imbalance_library_edition.pdfIn PDF document text
    • http://1xbets-regs.site/doliluxiredidowafofidt6v2i.pdfIn PDF document text
    • https://posalezonekat.weebly.com/uploads/1/3/4/6/134628665/moxobawudivexag-nuxixaninor-posumisefanora-jiviguxa.pdfIn PDF document text
    • http://axecheat1.xyz/gifugaj2ak9l.pdfIn PDF document text
    • https://topasotasakaro.weebly.com/uploads/1/3/0/8/130874498/088e5e365e32b.pdfIn PDF document text
    • https://cdn.sqhk.co/mamevugixej/jbmaiat/infrasound_detector_diy.pdfIn PDF document text
    • http://papakofowomida.22web.org/20912111215.pdfIn PDF document text
    • http://varuzajuv.22web.org/statistical_process_control_techniques.pdfIn PDF document text
    • https://nolutoxut.weebly.com/uploads/1/3/4/6/134683805/041aed19983a.pdfIn PDF document text
    • https://cdn.sqhk.co/sepokafaru/bicRfjb/53454841051.pdfIn PDF document text
    • https://cdn.sqhk.co/jenireni/bAiiqqX/79828738901.pdfIn PDF document text
    • http://pusokum.66ghz.com/express_in_rectangular_form_calculator.pdfIn PDF document text
    • http://songkfrk.site/6370259939okegy.pdfIn PDF document text
    • https://cdn.sqhk.co/dafazizaxav/gePjekR/61747989585.pdfIn PDF document text
    • https://kapalane.weebly.com/uploads/1/3/0/9/130968981/9459996.pdfIn PDF document text
    • https://cdn.sqhk.co/wifinalimow/Bighchg/the_walking_dead_wallpaper_4k_phone.pdfIn PDF document text
    • https://gibeduxobiwutu.weebly.com/uploads/1/3/4/7/134752611/7185783.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fa3f2985-242d-4a4c-93c0-6adbfb259eaf.filesusr.com/ugd/8dbe7a_62f40205c4cc4304b1f624fe25093942.pdf?index=trueIn PDF document text
    • https://cc67bef4-e22e-42fd-bf01-3f02b15f800b.filesusr.com/ugd/080020_cc04d935ac0042dcbb005f2e48cfbda0.pdf?index=trueIn PDF document text
    • http://poziluxolebulu.epizy.com/java_interview_questions_and_answers_tutorialspoint.pdfIn PDF document text
    • http://tuwigugu.rf.gd/28267927841.pdfIn PDF document text
    • https://74269c25-1731-4359-90d4-804f54ef9c1c.filesusr.com/ugd/b5973a_8eb7bbe8d49e41ff9f8eb7d81d776687.pdf?index=trueIn PDF document text
    • http://bogiginilaxano.epizy.com/engineering_mechanics_dynamics_8th_edition_free.pdfIn PDF document text
    • http://narezurirababod.rf.gd/lewerobogebulovu.pdfIn PDF document text
    • http://putiremupupunis.epizy.com/rinopumeweteligibi.pdfIn PDF document text
    • https://7fe6b731-3703-45da-bcbe-faf39b4d3392.filesusr.com/ugd/880a7e_8d426e6f312f4daaadbd62f1c1d46554.pdf?index=trueIn 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://scripts.sil.org/OFLIn 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.

FilenameKindSourceSize
font_00_sfnt_off0000edf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF3 5592 bytes
SHA-256: 3aabd50cd137af1af8914671dc6b6e22df6a745a5478a62512702ed493cb11dc
font_01_sfnt_off000100fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FA 22720 bytes
SHA-256: af8ccc08a9cfdbda19c6f97216e68a219cb0806acd5f716af1e9cd55a5fc0d06
font_02_sfnt_off000132a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132A5 16076 bytes
SHA-256: e50652907db2bc45b4da017945b4afd03174f172933881ae60240a6447644d12

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