Malicious PDF — malware analysis report

Static analysis result for SHA-256 ade06bc7cbe1e8d7…

MALICIOUS

PDF

84.6 KB Created: 2021-05-12 12:42:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d0b971672ae1b72988c688a0692b9739 SHA-1: 55fc77b49de4609b9923a6347bf46bdd08feaade SHA-256: ade06bc7cbe1e8d734398fbbf2396ffbfc6d02e69a06fa2578bee69a18523177
246 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains a link farm with numerous external URLs, many hosted on disposable domains, designed to redirect users. The heuristic 'SE_BRAND_CREDENTIAL_PHISH' indicates a lure impersonating Microsoft, directing users to a redirector URL that likely leads to a credential harvesting page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://xizidalubatud.weebly.com/uploads/1/3/4/5/134583516/7285226.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://dugedepap.ru/strik?utm_term=how+do+you+find+the+angles+of+a+right+trapezoid PDF link annotation
    • https://xizidalubatud.weebly.com/uploads/1/3/4/5/134583516/7285226.pdfIn PDF document text
    • http://kakorixow.mygamesonline.org/63294496303.pdfIn PDF document text
    • https://mikugixu.weebly.com/uploads/1/3/1/4/131438693/981d792b3a94cf5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467036/normal_6027a93c02afe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390071/normal_5fe06d7c60c93.pdfIn PDF document text
    • https://jaxevilin.weebly.com/uploads/1/3/1/6/131606955/votukukozupa.pdfIn PDF document text
    • https://tusezewepoxir.weebly.com/uploads/1/3/4/3/134339989/7166055.pdfIn PDF document text
    • https://sawamamuwez.weebly.com/uploads/1/3/5/9/135992332/sakewevapeba_vutamuba_vozosafolusikag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413239/normal_6055a39ea5e8c.pdfIn PDF document text
    • https://jifosibupegexuv.weebly.com/uploads/1/3/4/6/134692258/76da0.pdfIn PDF document text
    • https://kezuvuxir.weebly.com/uploads/1/3/2/8/132814306/vagatejifosituziliz.pdfIn PDF document text
    • https://givomolakif.weebly.com/uploads/1/3/4/7/134719940/1706538.pdfIn PDF document text
    • https://nokajadum.weebly.com/uploads/1/3/4/8/134887388/mosasaso.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://557345b1-98c6-442d-b460-9e357c178e5b.filesusr.com/ugd/dfb5f8_498ffcefce6d4027bae54e3e5aff0c78.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/perurulexi/86934858487.pdfIn PDF document text
    • https://4c2674ec-1430-4cec-a455-d6a35d10586e.filesusr.com/ugd/38955b_25d50be7108d4c828fabd9f02d5f1edb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/banula/tevaperikeranijurojudob.pdfIn PDF document text
    • https://s3.amazonaws.com/xuxifuzituwu/suunto_core_all_black_military_mens_outdoor_sports_watch.pdfIn PDF document text
    • http://doriponesarom.myartsonline.com/enfermedad_cerebrovascular_isquemica_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/hp_envy_4500_printer_manual.pdfIn PDF document text
    • http://tosurok.myartsonline.com/bodekuvefede.pdfIn PDF document text
    • https://eb22cd64-ba88-4d74-9269-d2b8937e52af.filesusr.com/ugd/3b217d_1d80b90183ab45a3aab020a055d13875.pdf?index=trueIn PDF document text
    • https://2ad55d82-15d9-4995-b72c-f03dca93b5f4.filesusr.com/ugd/11b7eb_f672c017c1cc46a3a9864e52497249a4.pdf?index=trueIn PDF document text
    • https://9de673a2-3b8e-40eb-bbf5-c0ad8e71a3da.filesusr.com/ugd/bd5c68_1c8a3044ff4344cf9f950eecaf286006.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
    • 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_off0000f256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF256 5508 bytes
SHA-256: 6ff02dc511550e856b5fb1225983c895e22a79b9416fa090edaeed492bd64fa1
font_01_sfnt_off00010533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10533 12288 bytes
SHA-256: fda56ce999b66602cd006ceb9619ae83427599991e3786b1756656c1507bfac6
font_02_sfnt_off00012f8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F8D 16072 bytes
SHA-256: 4ce97752c8d1ed0b0302a1507788019c6b738cc3ee96ca273f61f92c287db7cd