Malicious PDF — malware analysis report

Static analysis result for SHA-256 111843f46738843b…

MALICIOUS

PDF

73.1 KB Created: 2020-12-18 08:07:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c166720140aa164ffda016f3bea8d6be SHA-1: 6cf9ea7b252a44656d8d4f95786a15015b0a8ef4 SHA-256: 111843f46738843bd4967c51b9dea1c40d75a247c8e1429decc96aad9f6fb07b
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the PDF structure itself is used to host and redirect to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=theatre+festival+for+schools+2020+season
    • https://cdn-cms.f-static.net/uploads/4420432/normal_5fa5bb5366753.pdf
    • https://nofakuxuwuxow.weebly.com/uploads/1/3/4/6/134684799/6456971.pdf
    • https://fedijukesubi.weebly.com/uploads/1/3/4/6/134600597/6004112.pdf
    • https://cdn-cms.f-static.net/uploads/4462368/normal_5fb27d29c60ed.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/8a4a6e35-a6fe-449d-a88e-a5fa407d6d9b/seletamuxifox.pdf
    • https://uploads.strikinglycdn.com/files/8701a17e-db6a-47b2-9c27-6dcf5cff1e24/filirigiximip.pdf
    • https://s3.amazonaws.com/lekizopiloref/powerdirector_-_video_editor_app_best_video_maker_pro_apk.pdf
    • https://s3.amazonaws.com/zamuriza/anthology_of_modern_american_poetry.pdf
    • https://uploads.strikinglycdn.com/files/548630fd-c4b6-4706-bf93-635077775930/wosukepor.pdf
    • https://static1.squarespace.com/static/5fc668c6085bf90c0e22d7bb/t/5fd003dca21aaa12ce8af435/1607467997068/tizisujolavum.pdf
    • https://uploads.strikinglycdn.com/files/40ab6b60-525b-4d65-a278-77c028c36f45/55883176724.pdf
    • https://static1.squarespace.com/static/5fc5cfc716f6d44b07e04109/t/5fcbfc73d235d37878b05898/1607203955401/difozukulelur.pdf
    • https://s3.amazonaws.com/xakajoziwibi/lysol_power_toilet_bowl_cleaner_sds_sheet.pdf
    • https://uploads.strikinglycdn.com/files/5a01e94f-8766-4d02-a5b6-9ab787166dcb/25456423366.pdf
    • https://uploads.strikinglycdn.com/files/7371e371-f3bf-46ca-b057-29552fb437c2/potewife.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2dc.bin
79a36c7d8e8e071903927c020d37674c55244d5db5e16d907c7a638062ac4302		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE2DC 5252 bytes
font_01_sfnt_off0000f4b9.bin
fcc76651a108bc7afa3d01ce0372fd7aaf1ae2a46d11d61ec27b5001c67dfff6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B9 10308 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.