Malicious PDF — malware analysis report

Static analysis result for SHA-256 8386db0989739653…

MALICIOUS

PDF

77.8 KB Created: 2021-03-18 06:29:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 6ee45876d7609cfde7190627b4ce3c08 SHA-1: a4192446daea1805621a77d0b34fc3e19c978255 SHA-256: 8386db09897396535fe899fa54aad90be6611c0b66b9e7e99490311e9cd77a35
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, indicating a high probability of malicious intent. It functions as a link farm, containing numerous external URIs that redirect to various websites, likely for phishing or malware distribution. The presence of multiple external links and the use of disposable hosting services suggest a campaign to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://kuzutuzo.ru/strik?utm_term=1999+polaris+xplorer+400+4x4+value PDF link annotation
    • https://xafadefuvabajil.weebly.com/uploads/1/3/0/7/130776308/febekegududin.pdfIn PDF document text
    • https://nigukaxo.weebly.com/uploads/1/3/1/4/131453065/papapateb.pdfIn PDF document text
    • https://kipunazumalimak.weebly.com/uploads/1/3/4/7/134755782/sepatugarekuragupog.pdfIn PDF document text
    • http://gagivukamuw.getenjoyment.net/the_lion_the_witch_and_the_wardrobe_movie_songs.pdfIn PDF document text
    • https://zuvopiramalatug.weebly.com/uploads/1/3/5/9/135981479/0027f5bd46.pdfIn PDF document text
    • http://ribavid.medianewsonline.com/91195357790.pdfIn PDF document text
    • http://piwulag.sportsontheweb.net/15255802288.pdfIn PDF document text
    • https://koditagonuxu.weebly.com/uploads/1/3/5/3/135339835/tasovexemasono.pdfIn PDF document text
    • http://warowusavi.mywebcommunity.org/gepitadegel.pdfIn PDF document text
    • http://wozupabalaviv.medianewsonline.com/temokipe.pdfIn PDF document text
    • http://wovoradomumakil.medianewsonline.com/business_plan_example_free_download.pdfIn PDF document text
    • https://liwevapazu.weebly.com/uploads/1/3/1/0/131071299/wumuravov-mozedexuvapekuw.pdfIn PDF document text
    • https://zexamaginususu.weebly.com/uploads/1/3/4/6/134686515/b07ba9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fb9345b8-40be-4608-a8ff-9c5427dba92f.filesusr.com/ugd/98d639_1cf55576d2ca4d2dbbbbe2bfab5e01ec.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/best_templates_for_powerpoint_presentations.pdfIn PDF document text
    • http://tagijonegularol.myartsonline.com/89079674.pdfIn PDF document text
    • https://ba30dffa-51fe-4caa-9472-6f142403a9bb.filesusr.com/ugd/c2007e_8353889bb33244a38fc654c0dd6c9df1.pdf?index=trueIn PDF document text
    • http://beliraguw.onlinewebshop.net/685259962.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/the_amazing_spider_man_game_ps4.pdfIn PDF document text
    • http://roporuti.onlinewebshop.net/how_to_use_a_fragrance_oil_burner.pdfIn PDF document text
    • https://d4cba69e-f3c5-4a64-9e40-69ba24924691.filesusr.com/ugd/b73feb_f1ed75cc25b447679bd18075758bd903.pdf?index=trueIn PDF document text
    • https://b354d503-40d1-4c97-84b4-bc0b16c12f35.filesusr.com/ugd/8c7d07_d7cb6a624cc14a6f9910f501b8ade2a4.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DF 5284 bytes
SHA-256: b141fa17e9869d58d9723899f02233c0ddbec56ee995f3f2007989f9167cf6c3
font_01_sfnt_off000102f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F2 11292 bytes
SHA-256: ec9fcf65186120775ca2aa29dad35affcc22994d784fa568440c0e9d06206875