Malicious PDF — malware analysis report

Static analysis result for SHA-256 95a4dab3e706b63c…

MALICIOUS

PDF

70.1 KB Created: 2021-04-03 08:51:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: ece426289e8b5378cf755b77a23c8c2f SHA-1: 4c5eec9d0f2ab952ced0ea7943df380f09361378 SHA-256: 95a4dab3e706b63c3ec1930f3224691659ae3476d894bbb3b2aedfdee642e0f4
126 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing or trojan delivery mechanism. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates the document is part of a link farm designed to host numerous links on disposable domains, likely to distribute malware or conduct phishing. The embedded URL points to a suspicious domain, suggesting it's the primary lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ponafet.ru/123?utm_term=cipherlab+9700a+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444357/normal_6012c195a5720.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369905/normal_6051bcb1824fa.pdfIn PDF document text
    • https://cdn.sqhk.co/giwitosak/LicGUgi/67178470216.pdfIn PDF document text
    • http://miruzoguke.iblogger.org/alkaline_diet_for_dummies.pdfIn PDF document text
    • https://cdn.sqhk.co/zogegukidej/vzCziin/30179192307.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476782/normal_603fa22af0cd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413564/normal_6020a6b7d750c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408721/normal_5fcaa7b0cb82c.pdfIn PDF document text
    • https://cdn.sqhk.co/tomubozes/jhivqgf/bendy_mod_apk_android_1_traffic_rider.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487187/normal_6046653a04abe.pdfIn PDF document text
    • http://lilozekakotelup.sportsontheweb.net/tovepetet.pdfIn PDF document text
    • http://fupefabesosada.mygamesonline.org/jason_and_the_golden_fleece.pdfIn PDF document text
    • http://kidufamipowanot.mywebcommunity.org/600_essential_words_for_the_toeic_mp3.pdfIn PDF document text
    • http://ferafukapawap.scienceontheweb.net/tadutufirosigasegepakuze.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bumufir.rf.gd/origin_and_development_of_buddhism.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/huckleberry_finn_audiobook_chapter_38.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/72757209175.pdfIn PDF document text
    • https://s3.amazonaws.com/vedexajawo/lalopodevugelisamopu.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/monster_illuminessence_led_strip_review.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/custom_bottom_navigation_bar_android_studio.pdfIn PDF document text
    • http://lokunegop.epizy.com/how_to_get_the_battery_out_of_a_petsafe_collar.pdfIn PDF document text
    • http://gebukoxidu.rf.gd/ganapati_atharvashirsha_lyrics_marathi.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD608 5304 bytes
SHA-256: 56565339a75ca56e46308a27e8cda1935bc0241bb8110bd6a6f3aae6f5e0226f
font_01_sfnt_off0000e7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DF 10512 bytes
SHA-256: 90f250a8c7d75daca180cef5f208ace0233b9ee85c8d2cbd7ebf825f935898ca

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