Malicious PDF — malware analysis report

Static analysis result for SHA-256 934df89d879d967b…

MALICIOUS

PDF

78.4 KB Created: 2021-05-21 20:51:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a9c70824f0c3c19f42bc7354e9a1549d SHA-1: 44d08f2e4146ec8cd9ece636d0397caf68549d3a SHA-256: 934df89d879d967be7dbf72a196ee644a55ffecd652f92a304450e11c410726c
246 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing attempt. It contains a link farm with numerous external URLs, including one pointing to 'ponafet.ru' and another to 'butadagawonor.weebly.com', which is also flagged as a brand impersonation lure for 'Target'. The document body is heavily obfuscated and unreadable, but the heuristics strongly suggest a credential phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://butadagawonor.weebly.com/uploads/1/3/1/0/131070306/wopovegaj.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://ponafet.ru/strik?utm_term=reading+comprehension+games+for+2nd+graders PDF link annotation
    • https://butadagawonor.weebly.com/uploads/1/3/1/0/131070306/wopovegaj.pdfIn PDF document text
    • https://lemefiware.weebly.com/uploads/1/3/4/0/134017231/65fabf1dee2a.pdfIn PDF document text
    • https://wesotapaxo.weebly.com/uploads/1/3/4/4/134488604/102170.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463543/normal_600b4994caeac.pdfIn PDF document text
    • https://mugunerer.weebly.com/uploads/1/3/4/4/134479547/19ad3025b1fbd4.pdfIn PDF document text
    • https://zimegusak.weebly.com/uploads/1/3/4/6/134605775/kaporimekulof-mativirujav-jafaja.pdfIn PDF document text
    • https://wubeponasi.weebly.com/uploads/1/3/1/6/131606197/fe794cca2689.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484356/normal_5fe9d9ab1ddcd.pdfIn PDF document text
    • https://zumezotuxo.weebly.com/uploads/1/3/4/3/134332991/nozajitujisudox_jologabesopoxut_nazofeb.pdfIn PDF document text
    • https://juwibaviwexufeb.weebly.com/uploads/1/3/0/7/130739975/pazutururudirar.pdfIn PDF document text
    • https://ruwatavefi.weebly.com/uploads/1/3/4/7/134704280/dfd90.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369518/normal_5ff937c317aec.pdfIn PDF document text
    • https://vumevomuw.weebly.com/uploads/1/3/4/3/134335884/zafumefoza_zipumek.pdfIn PDF document text
    • https://bozixezexa.weebly.com/uploads/1/3/4/8/134861503/def77c5510749.pdfIn PDF document text
    • https://vexinafofonazes.weebly.com/uploads/1/3/1/8/131871992/gozitefebatuvur.pdfIn PDF document text
    • https://litaxavuve.weebly.com/uploads/1/3/4/8/134848922/000373.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/eea4a361-a17f-4fe4-bb15-6caee83bfe54/molaboz.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/movie_cannibal_holocaust_1980.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/kofijexotudininotabatew.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/spare_parts_for_hp_photosmart_7520_printer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/149b1134-99b3-4e30-bddf-e4c1ecf03a63/how_to_reset_bluebuds_x.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_off0000f3cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3CB 5676 bytes
SHA-256: 080b935c604660ed993af60570a54ecd14105e91928eabfd2fb223f4f5e4d914
font_01_sfnt_off000106f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F6 11012 bytes
SHA-256: bcec719b79a8b7e76f2b73dcb18defbe989661a5cf07c562ec992dfe346fc9f0

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