Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7daaad97ba4922f…

MALICIOUS

PDF

90.8 KB Created: 2021-04-27 20:46:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: a850867b0547e8702ce76e5f42fbdc5a SHA-1: ca9973b839c0f6fd716237a6398cfe1abec60285 SHA-256: d7daaad97ba4922f07b88252a26a3fedc671eb05479980dc015b7e91efc2900d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are used in a link farm pattern, strongly suggesting a phishing or scam attempt. The ML classifier and ClamAV detection further support its malicious nature. Although no scripts were extracted, the heuristic firings indicate the document's primary purpose is to redirect users to malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://dugedepap.ru/strik?utm_term=lifesmart+infrared+heaters+canada PDF link annotation
    • https://cdn.sqhk.co/wolebiduju/eghVhaR/word_cookies_cheat_apple_6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367643/normal_5ff94863c0725.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476593/normal_5ff2f2df9586f.pdfIn PDF document text
    • http://vitalia-transports.com/wugikeveforajekqm0vb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450733/normal_606a382e1b1cd.pdfIn PDF document text
    • http://bulapufidexiz.iblogger.org/20191429632.pdfIn PDF document text
    • http://ionatr.fun/mivopuvezl0pip.pdfIn PDF document text
    • http://socialwave.me/94803076762akix2.pdfIn PDF document text
    • http://kisapokabawexew.22web.org/25546764346.pdfIn PDF document text
    • https://cdn.sqhk.co/rewazexi/xxkKZgf/cosmos_quest_promotional_codes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476947/normal_6056769467c3e.pdfIn PDF document text
    • http://fruct.space/2227324786polfe.pdfIn PDF document text
    • http://rusherx.studio/13521800014ot4q4.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/Y4lbhcT/jipasaxovi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424647/normal_5ff22492bb639.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f855e53b-7869-48a2-8841-9a0691bc827b/2002_ford_ranger_workshop_manual.pdfIn PDF document text
    • http://fudojozijenabux.epizy.com/levimokawovenowuwugirufa.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/pompeii_tickets_and_audio_guide.pdfIn PDF document text
    • http://wunekoxewufomaf.epizy.com/adolescence_stage_of_human_development.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/meraku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7e87128-22e1-4c7d-907e-9beeb5ed53b0/48334626727.pdfIn PDF document text
    • http://walamuxo.rf.gd/51800384117.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/jolly_phonics_grammar_handbook_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99bfe468-09ec-4b3d-a5d2-4c42b687b3be/19572638331.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88de320e-7fe1-4f34-877a-a62bfe00ea95/which_app_is_best_for_learning_korean.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/futixokisifudunen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/419c3c6c-ef4f-4131-bba5-bbbc1331d3c9/what_provisions_did_the_mexican_constitution_of_1917_include.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_off000123b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123B1 5172 bytes
SHA-256: 9f8f6d57545e08175458b31e5f3fa3079776fda90fa42895ce18ba94c62bbe56
font_01_sfnt_off0001351c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1351C 12044 bytes
SHA-256: 02bbc7c02536b2f7c96fc90cf82b0c1dbb8556a0961eb25d00fd6766f53391c2