Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2cac6798bc5b7d2…

MALICIOUS

PDF

66.8 KB Created: 2021-02-12 16:15:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 1a8d3ef3b3e001a2b053cc0e43ee423a SHA-1: 2088bd08e7f0ac440457303551a785f324617c53 SHA-256: a2cac6798bc5b7d2e33764caa27d53f6d5925ea8fb3e96a5e5a2c3846f966a06
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://maypoin.ru/wix?keyword=strike+force+kitty+hacked+unblocked+games PDF link annotation
    • http://moreprodukti.com/fobufub6yyku.pdfIn PDF document text
    • https://cdn.sqhk.co/zikegasenar/ehgijlj/run_party_jindabad.pdfIn PDF document text
    • https://cdn.sqhk.co/sifilefu/hfhfRgg/followers_for_twitter_premium_apk_crack.pdfIn PDF document text
    • https://cdn.sqhk.co/wirubetena/giggifr/porulojatukonaton.pdfIn PDF document text
    • https://mafugefowodofo.weebly.com/uploads/1/3/1/3/131378796/4a0596940b4f.pdfIn PDF document text
    • https://fazijexin.weebly.com/uploads/1/3/2/7/132741066/nutanuwabiwozi.pdfIn PDF document text
    • https://cdn.sqhk.co/kibedutej/ahciUrh/mesiwiburesegat.pdfIn PDF document text
    • http://f13x.xyz/atonement_dress_patternozsy4.pdfIn PDF document text
    • https://cdn.sqhk.co/wodabakope/Xkp9jjk/find_free_big_fish_hidden_object_games.pdfIn PDF document text
    • http://nature-ital.space/84894429178wkakd.pdfIn PDF document text
    • https://cdn.sqhk.co/muvotugi/ihYEZgj/55822069838.pdfIn PDF document text
    • https://cdn.sqhk.co/merutigujet/PidgjUi/suzipuxisiguzimivafu.pdfIn PDF document text
    • https://cdn.sqhk.co/ravuviwidi/9krhbij/basketball_legends_unblocked_66_at_school.pdfIn PDF document text
    • https://cdn.sqhk.co/sigidezok/icgdsha/music_player_website_project.pdfIn PDF document text
    • https://cdn.sqhk.co/tipusuzog/SieIqje/first_birthday_party_cake_ideas.pdfIn PDF document text
    • http://openplafond.xyz/57243261646tnqz8.pdfIn PDF document text
    • https://cdn.sqhk.co/vefasebo/gicolji/calm_down_angry_neighbor_mod_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA53 5728 bytes
SHA-256: 9cf83235097a92f513232d9555b3422f3822039fa048c7493f8ff77d961207e5
font_01_sfnt_off0000cd96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD96 10056 bytes
SHA-256: d9186f44546c61cca39d34f0a254f14b18a40240bcc45d4f25d97b12ce591fbf
font_02_sfnt_off0000eff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF5 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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