Malicious PDF — malware analysis report

Static analysis result for SHA-256 d23d156609fdb024…

MALICIOUS

PDF

72.3 KB Created: 2021-01-04 01:46:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7c86545133c44d386cc4d5d407b9e2dd SHA-1: 981db481f19ee08b83c00c9ddb433e5c861aeb57 SHA-256: d23d156609fdb024247a170c5743e5e3ed9743c5ecb668bb9895e7f8369b7ca9
162 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, traffmen.ru, which is a strong indicator of malicious intent. The ML classifier and ClamAV detection further support this assessment. The embedded URL is likely intended to lead the user to a phishing page or a download of further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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://traffmen.ru/aws?utm_term=vehicle+accident+report+florida In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417414/normal_5fd9932545406.pdfIn PDF document text
    • https://cdn.sqhk.co/noruwotil/geFhdii/warship_hunter_war.pdfIn PDF document text
    • https://cdn.sqhk.co/fazovivum/iihc7IA/vaguxagizaledugevukelizis.pdfIn PDF document text
    • https://cdn.sqhk.co/fafovewidom/ThhijOe/kipufigawujakenulajavigu.pdfIn PDF document text
    • https://cdn.sqhk.co/zozijawutuxu/hAn8kgc/18821707513.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/nalifij/36190662295.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/tusuwenezenikisusosor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75c4aded-a501-47a8-8d11-06635ddf1d60/libufufigower.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/60060352684.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/irs_earned_income_credit_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/xolom.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_off0000defa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEFA 5032 bytes
SHA-256: 0fd218e31bedd2f0a3f03bb3a2d22860a5acb23417e737721a6e3ab052e3abb9
font_01_sfnt_off0000f019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF019 10716 bytes
SHA-256: bf1f8cee19be02152ec11f7d188de9300841f014b78addff1f957886a740d950

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