Malicious PDF — malware analysis report

Static analysis result for SHA-256 d82a93616bc93594…

MALICIOUS

PDF

74.7 KB Created: 2021-04-07 23:35:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: 83cf7b5071629d64820b11e9b179f400 SHA-1: 58b9371b839d757f36199bafba5b094a4bf5906e SHA-256: d82a93616bc935948c08dec36bdc3a2bc90a1d7652fe2420af2c51a295869a6a
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that appears to be a lure for downloading an Android application, indicated by the 'apk' in the URL. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URI are indicative of a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/wix?keyword=sixaxis+enabler+apk+full PDF link annotation
    • https://cdn.sqhk.co/lokiwejawe/IiiiaT0/russian_rider_online_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410217/normal_602958ea652a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428033/normal_5ff175c88977a.pdfIn PDF document text
    • https://cdn.sqhk.co/fogizotufijo/dwKhiwI/character_sheet_3._5_editable.pdfIn PDF document text
    • https://cdn.sqhk.co/jivazufevi/hb4UPez/zufobuvugalif.pdfIn PDF document text
    • http://gumovuf.22web.org/74231762223.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379222/normal_5fe1d77068524.pdfIn PDF document text
    • https://cdn.sqhk.co/weteroliwo/ig4hbgh/ritusaduvidaral.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/suxugipipolazog/mawonufuleriwopufefal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/385d5b14-9907-47c8-a7ad-13777acae990/95508197717.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11da0b72-3d6e-439f-8d01-fc27529bff63/75052930214.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/18449192694.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/stihl_br_600_magnum_blower_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/diminished_value_consumer_reports.pdfIn PDF document text
    • http://biwevugiwuk.epizy.com/dr_dog_babette_cole.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f34630a9-14b8-41fe-b5ac-a69eb13d0e33/nekilesaziranotavelufet.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_off0000e516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE516 5268 bytes
SHA-256: e1f1729009eb09338f76bb1a5ac86c206a2ba9cebd6471c2043add9ffb5c4d08
font_01_sfnt_off0000f710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF710 11440 bytes
SHA-256: ee3bd56eecdb6c0766ef7d7b20f041c63f29b63a5a057f4bf666dea2093e0de2

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