Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd886b45c5c27f92…

MALICIOUS

PDF

82.2 KB Created: 2021-04-25 00:06:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 0d035f22f415788989a21eba6138a2a8 SHA-1: 69c62f7ef9fdb877a208be441839ad349aaa89f0 SHA-256: fd886b45c5c27f92164f70c0079147c40420a6cb24f515b90b011264e0a8f0de
246 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was flagged by multiple heuristics as a phishing lure impersonating Apple. It contains a large number of external links, many hosted on disposable domains, directing users to potentially malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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 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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://laboxowoxom.weebly.com/uploads/1/3/5/4/135400847/6d997feadb274.pdf.
  • 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://botokaw.ru/strik?utm_term=main+tenets+of+feminism PDF link annotation
    • https://laboxowoxom.weebly.com/uploads/1/3/5/4/135400847/6d997feadb274.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446772/normal_605f44dd01110.pdfIn PDF document text
    • http://paxejunon.mygamesonline.org/xevilisake.pdfIn PDF document text
    • https://jimilosebot.weebly.com/uploads/1/3/4/0/134096588/sanenokodakubo.pdfIn PDF document text
    • https://cdn.sqhk.co/zinazejoras/3x76Ugi/sling_blade_movie.pdfIn PDF document text
    • https://bumobuzeki.weebly.com/uploads/1/3/4/4/134477779/3930573.pdfIn PDF document text
    • http://jovefupe.mywebcommunity.org/reading_practice_toefl.pdfIn PDF document text
    • http://zereteleriw.getenjoyment.net/89526757096.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427104/normal_601df892e64b4.pdfIn PDF document text
    • https://cdn.sqhk.co/modonasuje/aijdg0R/galaxy_invaders_alien_shooter_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/fejavegiwo/hbBUxji/jozepotapegumu.pdfIn PDF document text
    • http://mitimewigupito.mypressonline.com/census_2020_provisional_data.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389384/normal_5fd2ff73da7d7.pdfIn PDF document text
    • http://xepidenad.scienceontheweb.net/ceftriaxone_iv_davis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443372/normal_606e620808f8e.pdfIn PDF document text
    • https://legotukalijev.weebly.com/uploads/1/3/1/3/131380351/fifexix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453563/normal_600b117a7a360.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500208/normal_605f1984368b0.pdfIn PDF document text
    • https://bamaxasujobuz.weebly.com/uploads/1/3/4/3/134315865/591804.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388169/normal_5fd7a0461947d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481164/normal_5fe266f63bb4c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gavofime.atwebpages.com/jubosibafaxojivaw.pdfIn PDF document text
    • http://jozobudesurarab.onlinewebshop.net/32573343554.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_off000106fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106FC 4792 bytes
SHA-256: c9baa28ba99c41314474c3390810403f6454192fb939481e676aee8bab49f870
font_01_sfnt_off00011747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11747 10564 bytes
SHA-256: d9533ba5ad8470ce25087d686b537cedebe10ff37fe80aefae3e8289e5b7238b