Malicious PDF — malware analysis report

Static analysis result for SHA-256 33486dcae2dabb0e…

MALICIOUS

PDF

70.9 KB Created: 2021-02-20 17:13:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c66c850dfa3abcc7d51fcf3f8b54fe77 SHA-1: b8a6fb729907916490f20bec6c7a7784cecde415 SHA-256: 33486dcae2dabb0e31f2f3a5f789b42a4599643b40b84ed349d1cec82f726184
186 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 0.9996

Heuristics 6

  • 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.
  • 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://jacksth.ru/aws?utm_term=seven+storey+mountain+audiobook PDF link annotation
    • https://cdn.sqhk.co/supesuvepo/6RSBjeR/most_used_hashtags_right_now.pdfIn PDF document text
    • https://cdn.sqhk.co/zizaratijiga/UjihivI/97691319872.pdfIn PDF document text
    • https://fimiximokizo.weebly.com/uploads/1/3/1/3/131384127/6dd5180c4a8523.pdfIn PDF document text
    • https://zezowamizafomex.weebly.com/uploads/1/3/1/3/131381240/9933911.pdfIn PDF document text
    • https://mojabizozawobe.weebly.com/uploads/1/3/4/6/134699592/2417055.pdfIn PDF document text
    • https://cdn.sqhk.co/wupetutigo/e2Vjcja/3082509133.pdfIn PDF document text
    • https://cdn.sqhk.co/serodozire/uOjephd/hearts_online_live.pdfIn PDF document text
    • https://cdn.sqhk.co/wujamufaw/dgj0Dhf/tippy_tippy_tap_which_colour_you_want.pdfIn PDF document text
    • https://cdn.sqhk.co/xekowodu/gTeibnF/bupapeduwipobasepudejeb.pdfIn PDF document text
    • https://gagegopered.weebly.com/uploads/1/3/4/8/134880179/59da3df4.pdfIn PDF document text
    • https://cdn.sqhk.co/tatogevi/iegicha/great_farmhouse_plans.pdfIn PDF document text
    • https://ronupajowosoza.weebly.com/uploads/1/3/4/8/134871490/dajenazetuganumuluwe.pdfIn PDF document text
    • https://tabogivazosepa.weebly.com/uploads/1/3/1/8/131871767/vizapekuwudupak.pdfIn PDF document text
    • https://cdn.sqhk.co/lawafopugu/UyvHkur/space_life_simulation_games.pdfIn PDF document text
    • https://cdn.sqhk.co/mifigatira/jcgdjjK/35076332128.pdfIn PDF document text
    • https://cdn.sqhk.co/kugoxepif/haM2GX4/juvakepibikominujuxasi.pdfIn PDF document text
    • https://cdn.sqhk.co/datawafag/3ggjgjV/31727209063.pdfIn PDF document text
    • https://bafosuronam.weebly.com/uploads/1/3/0/7/130738527/zelupupo.pdfIn PDF document text
    • https://cdn.sqhk.co/mibemofega/i9ghBVp/tuwuxekuvakaralukegudito.pdfIn PDF document text
    • https://cdn.sqhk.co/fuzomorikat/iiczjjj/sheltered_part_or_side_crossword_clue_3_letters.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://wiwekire.epizy.com/87340515985.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000caed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAED 5292 bytes
SHA-256: 9b9e9114de548bc349ed1df9b19d9b49b0c8a4fc959eec9ed873e87089c174c8
font_01_sfnt_off0000dcd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD4 10644 bytes
SHA-256: bb14c89ba0a70c4e0b75d738498fd5ec211a958ac5d1dcc9723dcf63cf21c209
font_02_sfnt_off00010027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10027 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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