Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e804c8a130b3ea…

MALICIOUS

PDF

78.9 KB Created: 2021-04-17 10:21:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 81505318765ef0c2eea089bf765ac250 SHA-1: 808d5b7d92bbccb16240fb10020db99f7ab4cb4d SHA-256: 80e804c8a130b3ea08d153fb5c1180645a88e98a01cd359585783509e82c25ff
136 Risk Score

Malware Insights

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

The sample was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an external URI pointing to a suspicious domain, likely used for phishing or malware distribution. The presence of 'cmd.pdf' in the document text suggests an attempt to disguise malicious activity as a command execution, further supporting the phishing attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://jottigo.ru/strik?utm_term=oster+bread+machine+parts+ckstbrtw20 PDF link annotation
    • http://ledimpress.biz/the_servant_leader_james_autry_audiobookt8uph.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504047/normal_6022d793e30ca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365582/normal_5ffef1461b87f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461245/normal_5ff90a1ca89cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390663/normal_5fdf87857dd78.pdfIn PDF document text
    • http://instapriz365.site/5953853774uk5od.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366011/normal_6012e03862759.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378613/normal_5ff496fa65876.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406191/normal_6002d09f1b1ed.pdfIn PDF document text
    • https://cdn.sqhk.co/goduwonon/3gjjQRR/mipivizupasafurivozexu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461777/normal_5fe7b9768ba4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417983/normal_6027cfff7d452.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408858/normal_5ff2aad56e7d1.pdfIn PDF document text
    • https://cdn.sqhk.co/goberirud/jdLBsbp/write_on_ipad_app.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451565/normal_5ff53d62edb34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499002/normal_606e13cd118c1.pdfIn macro / runtime command snippet
    • https://static.s123-cdn-static.com/uploads/4446158/normal_6004e07318273.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388820/normal_603b3e36261b9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451565/nIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/847a63f2-5e56-41bb-b26e-52d42676be8b/yoga_breathing_exercises_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa9726f9-994d-4d48-989c-87055ff36271/jarizadot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdef49b8-76d1-43ab-bce2-d31abbb64c79/sofazigopuna.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17a95b9a-756a-4b30-959d-c0d35e13c333/how_do_i_find_my_ip_address_using_cmd.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_off0000f4e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E9 5876 bytes
SHA-256: 4bd5a2ee0e586ed70b7a045b5f7f1b9fe8515101390a3b37c421031be5341599
font_01_sfnt_off000108c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108C8 11024 bytes
SHA-256: d44fc2713d02911408273646b9c5d11e4c408ea67c28389f0c41f454d3a313f0

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