Malicious PDF — malware analysis report

Static analysis result for SHA-256 6efc86cb77cb75b6…

MALICIOUS

PDF

68.2 KB Created: 2021-01-14 11:37:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 564efda8b6e6775c3bb14777f6f4276b SHA-1: aee35a826fc34ba30c10c1b89744169484454df9 SHA-256: 6efc86cb77cb75b60c8b0300b0bb3e6153755f1db2b43828eb5a21ce6d32e9bd
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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.
  • 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=chain+guide+road+bike In PDF document text
    • https://sapurokegija.weebly.com/uploads/1/3/4/5/134577933/ditujamur-josud.pdfIn PDF document text
    • https://zimegusak.weebly.com/uploads/1/3/4/6/134605775/6375310.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489992/normal_5fd0a9fec5003.pdfIn PDF document text
    • https://nibobesexetew.weebly.com/uploads/1/3/4/2/134266191/979202.pdfIn PDF document text
    • https://cdn.sqhk.co/dopuwene/ioZihge/honor_of_kings_be_a_king_mod_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473052/normal_5fffb0f0f3e03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408712/normal_5fd1655bb114e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367922/normal_5fedf55bc91df.pdfIn PDF document text
    • https://gokopawe.weebly.com/uploads/1/3/4/4/134493337/4589730.pdfIn PDF document text
    • https://cdn.sqhk.co/ledodatefu/haheieF/share_chat_malayalam_love_video_whatsapp_status.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d1e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E2 4988 bytes
SHA-256: 58ac419be3db78cb112a45c8306e6177e92cd2f0e1fe54cc14647cfb7fbf9e2c
font_01_sfnt_off0000e2c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C9 9928 bytes
SHA-256: bc20e1767851d6da2ace6fd818a464892c762f30a39c08c84384ffca52b3ee17