Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ac87b27029657c0…

MALICIOUS

PDF

74.9 KB Created: 2021-01-03 13:03:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 1bcfee8f81389b2a32652fbc0e176f2e SHA-1: 7364c8d543629834c4aef17863eec3a606aa1db2 SHA-256: 8ac87b27029657c0ab3935e7eae50dba6d48be7870a5859fb88f6474c05fd753
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://traffnew.ru/aws?utm_term=lol+item+guide+2018', which is likely used to deliver a secondary payload or redirect users to a phishing site. The document body, though heavily obfuscated, suggests a lure related to an 'item guide'. No scripts were extracted, but the presence of external URIs and the overall classification strongly suggest a phishing or malware distribution 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://traffnew.ru/aws?utm_term=lol+item+guide+2018 PDF link annotation
    • https://cdn.sqhk.co/zetanitanedo/gggijam/luzumatafufaxofa.pdfIn PDF document text
    • https://cdn.sqhk.co/bavomizobe/Ehihbjh/gozixegutusuvugikogi.pdfIn PDF document text
    • https://cdn.sqhk.co/kepebeso/8pnTjiJ/amazon_music_unlimited_cost_for_prime_members_uk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417995/normal_5fca47a870dd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367305/normal_5fa0c4078602d.pdfIn PDF document text
    • https://cdn.sqhk.co/xufatirumina/Zhhjfje/52012860320.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/dojivewobasuval/89338857303.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e5b9548-b959-48c3-b283-81f545a087d3/fifalokiwokaxopobimujel.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/grace_fit_workout_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/10_up_business_card_template_indesign.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60fcc3df-7077-4670-8619-a42b2b88845d/mopap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bfcece22-0b3e-45d4-9c80-9a9b8eb93624/19400388638.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1D 2920 bytes
SHA-256: 214af57da0742dc166c9fae236394dc7a800ceb549b8d7ad4b915bb44e498b9f
font_01_sfnt_off0000e776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE776 5124 bytes
SHA-256: a369d18c0f113b8b8d382bbd531708b0ebab9765311b1e56138feed3820caee8
font_02_sfnt_off0000f8df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DF 11784 bytes
SHA-256: 79ecaddf8fba644cc5b7717547fca761c9f039f4af3ec7b98e689d47edec2194

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