Malicious PDF — malware analysis report

Static analysis result for SHA-256 08b124ce9fb6620a…

MALICIOUS

PDF

74.5 KB Created: 2021-03-05 18:52:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 41fcb87574d8edb6c0e1111ba4975e0f SHA-1: dcedabd35393e942770b75043e9f20454f649c7e SHA-256: 08b124ce9fb6620a7a506fa32c6970887a0c98a6237f18f4747ce2b567755961
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains an embedded URL that leads to a domain associated with phishing, likely intended to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to 'atomic clock instructions'.

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://resalured.ru/strik?utm_term=sharp+atomic+clock+instructions+time+zone PDF link annotation
    • https://cdn.sqhk.co/muzorefu/heW2pjc/kubimiretu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453747/normal_5fcda029d2775.pdfIn PDF document text
    • https://cdn.sqhk.co/ponesigis/fAL0hd4/93350699038.pdfIn PDF document text
    • https://cdn.sqhk.co/wujugojuse/jbWkgjO/sufineralimu.pdfIn PDF document text
    • http://sosiwawivijomo.scienceontheweb.net/goriz.pdfIn PDF document text
    • https://cdn.sqhk.co/deloreba/ZtYthdt/pasosuvafotizuk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375541/normal_5fee530a3b81b.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/jiTcD3A/movistar_colombia_telefonos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gevosumol.epizy.com/wurowijagiliwanutejuwo.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/somatoform_vs_factitious_disorder_vs_malingering.pdfIn PDF document text
    • https://s3.amazonaws.com/lodazojamuva/cialdini_influence_tactics.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/16049130762.pdfIn PDF document text
    • http://folilef.rf.gd/anthrax_exposure_and_awareness_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/penefelomiju/zarchiver_donate_apk_latest_version.pdfIn PDF document text
    • https://s3.amazonaws.com/jizubisetebof/guzutixipawisixivasuwina.pdfIn PDF document text
    • http://wutejaxevewef.myartsonline.com/63061581267.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_off0000e674.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE674 5392 bytes
SHA-256: 9cd65a617541e3776ad6943161644b7369d61bd59bbc43c2c94db320459d016f
font_01_sfnt_off0000f8a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A1 10580 bytes
SHA-256: 10f0fa1b723de20ff87d9288d56f7084885c012f4f037d47fa121d4d49a9bffd

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