Malicious PDF — malware analysis report

Static analysis result for SHA-256 f64180af35e1a97b…

MALICIOUS

PDF

78.5 KB Created: 2021-01-03 20:51:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3679d340b87dc9df4ab068b2457424f9 SHA-1: 951c74201d51120d0e36a90bba3215b0348ade1a SHA-256: f64180af35e1a97bfaccaa20f2bafc33ddeec273ab106e65f9ab48b414fd2335
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to distribute malware or facilitate phishing. The presence of a URL with 'clash+of+clans+apk+download+uptodown' in its query parameters indicates a lure for potentially unwanted or malicious software downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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.
  • 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://traffine.ru/123?utm_term=clash+of+clans+apk+download+uptodown PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465269/normal_5fbc0849b3a5b.pdfIn PDF document text
    • https://cdn.sqhk.co/xurazegoba/w1if7UT/zokuwesiwefomubufimivato.pdfIn PDF document text
    • https://cdn.sqhk.co/vibifexode/ijajiif/nakodifubuvunegapib.pdfIn PDF document text
    • https://widowajezow.weebly.com/uploads/1/3/4/5/134584852/tobuwizuva.pdfIn PDF document text
    • https://movulejovem.weebly.com/uploads/1/3/4/4/134470355/669fa103ef227.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495985/normal_5faf2ac69f667.pdfIn PDF document text
    • https://cdn.sqhk.co/zubuwebofe/gjvjeii/instagram_search_and_explore_feature.pdfIn PDF document text
    • https://fisolaxarod.weebly.com/uploads/1/3/4/4/134471724/rusobagap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414864/normal_5fc0098ca2cb4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407983/normal_5fdf7237e825f.pdfIn PDF document text
    • https://bozozojiretul.weebly.com/uploads/1/3/4/7/134770512/8768138.pdfIn PDF document text
    • https://pareropifu.weebly.com/uploads/1/3/4/3/134349273/sefopigom.pdfIn PDF document text
    • https://fofaxofik.weebly.com/uploads/1/3/4/5/134521529/donumazeke-baruzarolaru-barejokojekez.pdfIn PDF document text
    • https://cdn.sqhk.co/xopigotax/hdCA61D/10355413484.pdfIn PDF document text
    • https://cdn.sqhk.co/lanamixese/ZF32jWW/phoenix_rc_flight_simulator_dongle_emulator_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/23ae97c9-21a1-41f6-9c1a-f3c71f14551b/sirumowomitus.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7D 5208 bytes
SHA-256: 80af5eb50c1e72a5c4ab9b7e9bdf37276b0c5f0354959246bc211e09064afe81
font_01_sfnt_off0000f144.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF144 11316 bytes
SHA-256: d231c6bb2516a22337dfe3dfe0abcf4deab468bd1e7668399be3de1a03b0f080
font_02_sfnt_off00011807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11807 16092 bytes
SHA-256: c9557d91917e40dbb2ce09b7ef560a04a9a832ffe2ebcac6b50408a58351272e

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