Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6f6d8dbef3f0eb4…

MALICIOUS

PDF

71.7 KB Created: 2021-01-11 10:11:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 91253d092b6a6951416c651161ce077f SHA-1: 39c96058a347fb046ad0b671db1d51a98eed5692 SHA-256: e6f6d8dbef3f0eb4df7895ff2fef92158d2ffd5bc72ea82637e8e193977bdebe
184 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV detecting it as Pdf.Phishing.Trojan. The file contains numerous embedded URLs, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, appears to be a lure related to movie songs, suggesting a phishing or malware distribution attempt.

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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffine.ru/aws?utm_term=bakrid+movie+video+songs In PDF document text
    • https://site-1083884.mozfiles.com/files/1083884/50653689909.pdfIn PDF document text
    • https://luwobidope.weebly.com/uploads/1/3/0/8/130814225/d2aec667.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388614/normal_5fa374dd3bcfe.pdfIn PDF document text
    • https://dusexitope.weebly.com/uploads/1/3/4/6/134646398/9944119.pdfIn PDF document text
    • https://site-1200133.mozfiles.com/files/1200133/wezofobipenamukem.pdfIn PDF document text
    • https://site-1174988.mozfiles.com/files/1174988/max_express_lube_fort_myers.pdfIn PDF document text
    • https://site-1166067.mozfiles.com/files/1166067/truck_road_16_most_dangerous_mod_apk.pdfIn PDF document text
    • https://site-1174906.mozfiles.com/files/1174906/nupokopux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428043/normal_5fc4b7af6343e.pdfIn PDF document text
    • https://site-1166600.mozfiles.com/files/1166600/eclipse_configure_android_sdk_path.pdfIn PDF document text
    • https://site-1176953.mozfiles.com/files/1176953/89822149094.pdfIn PDF document text
    • https://xejoxobufedad.weebly.com/uploads/1/3/3/9/133997298/roralabubala_teromun.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493541/normal_5ff4a64cbd386.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_off0000dba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA8 5288 bytes
SHA-256: 9690b05b2fe9b640f30380f0c0f05f4d6f9b3d481296992c25204935d6535eb8
font_01_sfnt_off0000ed9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9C 10568 bytes
SHA-256: dced5a778a2535d6e38a23067060bb6edc2c87c0e45a6f4093c7f94bfef27a87

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