Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a22bfe4469c205b…

MALICIOUS

PDF

77.6 KB Created: 2021-03-14 14:51:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 97c59338437c0e50f6433bc0206c4819 SHA-1: cab5e42dd82028e5bdf69c59617a12b70f650680 SHA-256: 1a22bfe4469c205ba1dfff9fde4a5b59ff5872f9dc3de3490716514027423d1e
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to movie downloads, which is a common tactic for phishing or distributing further malware. The presence of embedded URLs and the link farm heuristic indicate an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/123?utm_term=kaabil+movie++720p PDF link annotation
    • https://cdn.sqhk.co/gafisasiwu/ibHggjc/dowejupoweboser.pdfIn PDF document text
    • http://kepukarob.sportsontheweb.net/how_to_repair_your_whole_body.pdfIn PDF document text
    • http://getcabinets.xyz/the_outsider_synopsis_episode_1p9px7.pdfIn PDF document text
    • http://potuduwatolebu.mywebcommunity.org/basquetbol_historia.pdfIn PDF document text
    • http://rixorevu.getenjoyment.net/how_much_does_it_cost_to_replace_a_clutch_in_a_ford_ranger.pdfIn PDF document text
    • https://cdn.sqhk.co/kivuwutu/IFhhjg6/vemexeripomijetemebid.pdfIn PDF document text
    • http://rofogukiluvupu.mygamesonline.org/introduction_to_public_relations_book.pdfIn PDF document text
    • http://dusibarupuguli.medianewsonline.com/84288197677.pdfIn PDF document text
    • https://berekimitavogi.weebly.com/uploads/1/3/1/4/131452750/jedobaw.pdfIn PDF document text
    • https://rimokukesezawuk.weebly.com/uploads/1/3/1/4/131437069/kapedudojabevabaxed.pdfIn PDF document text
    • http://tejasatobes.medianewsonline.com/calories_arbys_roast_beef_slider.pdfIn PDF document text
    • https://cdn.sqhk.co/simirides/ggD0gib/family_business_board_of_directors.pdfIn PDF document text
    • http://juwoniki.getenjoyment.net/99434655387.pdfIn PDF document text
    • https://dinowupeguf.weebly.com/uploads/1/3/1/3/131379410/folajezene.pdfIn PDF document text
    • http://totalcreditcheck.info/4067607660tibyf.pdfIn PDF document text
    • http://viteroludobano.mypressonline.com/xikimatarukipejirozizuv.pdfIn PDF document text
    • http://wefufivubulal.medianewsonline.com/32392870331.pdfIn PDF document text
    • http://mandarin-fruit.space/tooltips_cognos_report_studio5pt42.pdfIn PDF document text
    • http://train-home.ru/feluxuruwerptng.pdfIn PDF document text
    • http://busibear.com/6897366131fnxx0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD333 5212 bytes
SHA-256: 9a086ad748885a07df171cabd91d770ca41f2782448cf33c7c71cdaaf3b83be0
font_01_sfnt_off0000e4f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F0 10764 bytes
SHA-256: b414d0504da7c6db8ca61912e1e2cd869d372ae2e79c9f121534b75373197b60
font_02_sfnt_off000109d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109D3 18908 bytes
SHA-256: e68f8e6eaf09ae10b2e97317be7774edca869d830e15e9bad2cb8c5ca8771612

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