Malicious PDF — malware analysis report

Static analysis result for SHA-256 0332cb9068e52036…

MALICIOUS

PDF

114.7 KB Created: 2021-05-17 07:21:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 622aacc50d5b31b1db6dc2d8838ae3b6 SHA-1: 66a3f430c604c8e317cf9177161405c8cc31061f SHA-256: 0332cb9068e52036e639af08330668fd0a25accde27bf054c3e1a705af05c5ac
256 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying a 'brand-impersonation credential phishing lure' pointing to a redirector URL. The presence of a password-protected archive lure suggests an attempt to bypass security controls. While no scripts were directly extracted, the ML classifier and ClamAV detection strongly indicate malicious intent, likely involving exploitation or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 7

  • 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.
  • 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://fexalikinuzumow.weebly.com/uploads/1/3/5/3/135324316/repotovosipo.pdf.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/wb?keyword=sql%20server%20database%20security%20policy PDF link annotation
    • https://fexalikinuzumow.weebly.com/uploads/1/3/5/3/135324316/repotovosipo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417119/normal_6013dbbbe25e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470401/normal_5fd921ca1d8bf.pdfIn PDF document text
    • https://gamajebijapam.weebly.com/uploads/1/3/1/8/131856653/5c14ab8c9ff7.pdfIn PDF document text
    • http://dejepuzalew.mygamesonline.org/cbse_12th_accountancy_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408475/normal_603c2f29ed25f.pdfIn PDF document text
    • https://tedalemom.weebly.com/uploads/1/3/5/3/135398197/vubabezifesotefugub.pdfIn PDF document text
    • http://lamejix.scienceontheweb.net/sumaseverajanepamama.pdfIn PDF document text
    • https://kulipimeg.weebly.com/uploads/1/3/2/6/132695915/1194373.pdfIn PDF document text
    • http://tevojagi.iblogger.org/83437276701.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372087/normal_60643631e3d36.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/putelekireza/boston_aphasia_test.pdfIn PDF document text
    • http://soxosodazafu.epizy.com/xoruwosavulolefages.pdfIn PDF document text
    • http://wemubivoparuf.epizy.com/palo_alto_networks_aperture_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zuniverijesud/zokusologibivowizezi.pdfIn PDF document text
    • http://gototura.myartsonline.com/rixebilekutupaxajoninob.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/autosomal_recessive_inheritance_pattern_questions_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/public_holidays_2019_south_africa.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/94512807962.pdfIn PDF document text
    • http://pojesonedako.epizy.com/hound_of_the_baskervilles_book_cover.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/rikofotifovotul.pdfIn PDF document text
    • https://s3.amazonaws.com/pulujolatepuv/kadan.pdfIn PDF document text
    • https://s3.amazonaws.com/vekodupiwarobi/27845243638.pdfIn PDF document text
    • http://sokekakeloji.onlinewebshop.net/tonakejeruvuvewekegamidel.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_off00018009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18009 5596 bytes
SHA-256: 22183af34639787807aa3740b311092f4df85b99e01819b49778c265f0cfa8ac
font_01_sfnt_off00019324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19324 12196 bytes
SHA-256: 362813709d3337e94970d3ed403a1e9b4420c41738b7e0a434513627fb2253fb

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