Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad9ab479f78c03a4…

MALICIOUS

PDF

70.6 KB Created: 2020-11-24 13:05:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 9b3cda7340ceb450524bbc6b8f9a6c40 SHA-1: d66eef71f957f70dbebe11443abeafba2e176d44 SHA-256: ad9ab479f78c03a46886b2cb81d51638e2028f21be3e7c18bf90f9547de9f777
104 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a critical heuristic firing for ClamAV detection. The PDF contains embedded URLs, one of which, 'https://trafffe.ru/strik?utm_term=olds+maternal+newborn+nursing+10th+e', is likely part of a phishing or malware distribution scheme. The presence of urgency language in the document body further supports a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://trafffe.ru/strik?utm_term=olds+maternal+newborn+nursing+10th+e PDF link annotation
    • https://nogomikosisodop.weebly.com/uploads/1/3/2/6/132681488/mopazotafukiru.pdfIn PDF document text
    • https://vazagivire.weebly.com/uploads/1/3/4/8/134874695/gatigoxapenurisa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387703/normal_5fbad56a0169c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385427/normal_5f9806054fb7a.pdfIn PDF document text
    • https://gilasagajeradek.weebly.com/uploads/1/3/4/6/134632792/3857254.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369146/normal_5f99adc2e06bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408701/normal_5fb7a38aab1fc.pdfIn PDF document text
    • https://rawofaweka.weebly.com/uploads/1/3/0/7/130775842/d572c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/8317ab37-3e85-4fb9-bb9b-fb1595ee1b7b/how_to_find_the_intersection_of_two_lines_on_a_ti-84_plus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70c93b94-590f-4296-96b8-e9864432bc56/sigovajekasu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8c5e199-403b-4900-a758-65fa6a602664/mixabakiwabamejisitezuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/517e2b1d-7246-49ff-ab71-44f11c41d46f/8132777055.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4eaf4906-3578-48ea-8c07-762385f2d59b/the_american_pageant_download.pdfIn PDF document text
    • https://s3.amazonaws.com/bejeseja/logic_pro_x_groove_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74fa783d-2912-4de7-b9f3-7bb5ec06caea/terrace_house_tokyo_2019_2020_downlo.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_off0000d34c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD34C 5692 bytes
SHA-256: 96690639e4af426acce5020be1df30107626892117e60afe54dcdfac170f48ce
font_01_sfnt_off0000e68b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE68B 11372 bytes
SHA-256: 1d1e511d7af80a7ad848a1289d06b1f2163b1f987e499081338781bd146645d1

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