Malicious PDF — malware analysis report

Static analysis result for SHA-256 dab2d731ef5fa60e…

MALICIOUS

PDF

65.9 KB Created: 2021-02-23 01:36:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2311d2cf1595647fd92da52d955a6937 SHA-1: 234cd294c876a0a30f738f8b44c6c7954ea5f585 SHA-256: dab2d731ef5fa60ebb0550e02f6a39565afc2b2cc680786906acfe6715297596
104 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically identified as a phishing trojan. It contains embedded URLs, one of which is `https://seumenha.ru/strik?utm_term=ipod+touch+5th+generation+user+guide+pdf`, suggesting an attempt to trick users into downloading further malicious content by masquerading as a user guide. The presence of a 'download button' heuristic further supports this phishing lure.

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://seumenha.ru/strik?utm_term=ipod+touch+5th+generation+user+guide+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4368497/normal_5ffc633405b17.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380680/normal_5fec3c1a4c84a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490754/normal_5fd718e6497d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376087/normal_5ff8ac4bcc4c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468296/normal_602db4b07f8bb.pdfIn PDF document text
    • https://cdn.sqhk.co/furugilenu/hHgiTii/muwekisosiwepeduke.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485569/normal_5fe2e61d86a70.pdfIn PDF document text
    • http://letgtma.bid/certified_fraud_examiner_exam_formatk1s82.pdfIn PDF document text
    • https://cdn.sqhk.co/zixapegof/iegcjgh/jesubiwararokokafogap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486356/normal_6020fdf7d9cd7.pdfIn PDF document text
    • https://cdn.sqhk.co/zubuwebofe/egchcii/jamufazemijadomojodetodi.pdfIn PDF document text
    • http://normal-id.com/ranoravuzojosixatuzal8wb9r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490720/normal_601a105c53c01.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489240/normal_6008f842dc7a5.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/ghjfeDk/royalty_free_italian_restaurant_music.pdfIn PDF document text
    • http://ing-jobs-opportunities.com/shark_eating_fish_game_on_scratch3weyi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465396/normal_60150f1ea1eb6.pdfIn PDF document text
    • http://realwockyc.info/where_is_the_filter_on_an_lg_top_load_washern28ew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454575/normal_602810e1c7add.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491936/normal_60015012cae69.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/rejiner/rotegulabiralesukamado.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_off0000c56b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC56B 5448 bytes
SHA-256: 67ad9001bfbeaaf50478a2e7836c602a288f201f12bf0aeb38fad51fa267f403
font_01_sfnt_off0000d7f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F7 10032 bytes
SHA-256: 39bbc57791807cc6091701a71e48fe8c37ae600ca54124620b51dc33aa7afcea

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