Malicious PDF — malware analysis report

Static analysis result for SHA-256 93d0a9b8bfd28a0e…

MALICIOUS

PDF

73.1 KB Created: 2020-11-18 08:20:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 412eacb4ab97987c561db401625a5e39 SHA-1: d61a5228d1d6321b1799516365eb5fce329b66f6 SHA-256: 93d0a9b8bfd28a0e49b7baf4ceceada71de1446f83a7055a39ca91aaa6e73cd9
96 Risk Score

Malware Insights

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

The PDF contains a lure related to 'guided reading activity 12-3 answers us history' and embeds a URL pointing to a suspicious domain. ClamAV and ML classifiers flagged this PDF as malicious, indicating it likely serves as a phishing or malware distribution vector. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/123?utm_term=guided+reading+activity+12-3+answers+us+history
    • https://fusemikak.weebly.com/uploads/1/3/4/6/134649426/42c4c03.pdf
    • https://vufufibujirefe.weebly.com/uploads/1/3/4/3/134355905/74a033821d4f.pdf
    • https://cdn-cms.f-static.net/uploads/4366358/normal_5f8735bc93a06.pdf
    • https://roxomutina.weebly.com/uploads/1/3/4/6/134663133/a3d337cd9d.pdf
    • https://cdn-cms.f-static.net/uploads/4377109/normal_5f8e58b694ebc.pdf
    • https://cdn-cms.f-static.net/uploads/4384836/normal_5f8f9aa00a2bf.pdf
    • https://cdn-cms.f-static.net/uploads/4402951/normal_5fb3e51bcb7d2.pdf
    • https://detosujedeke.weebly.com/uploads/1/3/4/3/134371576/c99232a093ff001.pdf
    • https://cdn-cms.f-static.net/uploads/4366309/normal_5f88d2370a325.pdf
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5f87148dc0605.pdf
    • https://worobewunit.weebly.com/uploads/1/3/1/4/131406731/fuzewomuzowa_bikav.pdf
    • https://nozagovedenide.weebly.com/uploads/1/3/2/6/132682533/3366378b6c.pdf
    • https://cdn-cms.f-static.net/uploads/4384645/normal_5fa91fb406190.pdf
    • https://nupejaxisolerez.weebly.com/uploads/1/3/4/3/134348845/tekarozujekinurasab.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d256.bin
7ba93f13f1a93389381133e2f6f8821e3a8c423df0f72af1709d46ba3c18856a
pdf-font-stream PDF embedded font (sfnt) at offset 0xD256 5716 bytes
font_01_sfnt_off0000e5f2.bin
65af6c4626248a03c435acea40a102e9c744e39aa73eb3b5ff470472707d7d70
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F2 10448 bytes
font_02_sfnt_off00010976.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10976 4324 bytes