Malicious PDF — malware analysis report

Static analysis result for SHA-256 986c9e0860d58465…

MALICIOUS

PDF

99.2 KB Created: 2021-01-22 07:41:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 2a89cd0a41ff85c26df208549c71e732 SHA-1: e2e7723e107ba72e44e1ce3bedc8206a3f6f0297 SHA-256: 986c9e0860d584655ba281e340317ab3f2911d3b0d6117fff9135c51f3f94908
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple critical heuristics as malicious, including a redirector link and a link farm. The ML classifier also strongly indicated maliciousness. The embedded URLs likely lead to phishing sites or further malware downloads, consistent with a spearphishing attachment attack pattern. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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 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.
  • 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://gettraff.ru/123?utm_term=1500+thread+count+sheets+good+or+bad In PDF document text
    • https://static.s123-cdn-static.com/uploads/4366407/normal_5fdd892aa0406.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376375/normal_5ff770cbd1143.pdfIn PDF document text
    • https://cdn.sqhk.co/kovutego/hbMichc/sabutezodawidasixotobugun.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498330/normal_5fddbae5b655f.pdfIn PDF document text
    • https://cdn.sqhk.co/soredepel/njegeLm/super_gas_drag_car.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465394/normal_5fea0dc4049dd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450034/normal_5fcf1fc7c503c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486975/normal_5fe3a1cf5bcd1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458833/normal_5febe79b3cd94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366377/normal_5fdafed7e7e0c.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/5gdBzgi/can_you_cut_rope_lights_to_length.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426822/normal_5fe4aaf006266.pdfIn PDF document text
    • https://cdn.sqhk.co/bofimekowadu/e2Fgfw2/61648833193.pdfIn PDF document text
    • https://birivisixakaxe.weebly.com/uploads/1/3/4/6/134608058/rasegelufomuteb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463551/normal_5fe0ac530bee6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501770/normal_5fde6ebf4d865.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/jolozidabi/nogifiri.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14675 5532 bytes
SHA-256: 46e04c36c15186d44834489a9fca8e63b6164def3302ca80eab2cb71a3b1dc68
font_01_sfnt_off0001593f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1593F 11380 bytes
SHA-256: 2ab5b8fed54e5ab4daf23f7f70163e7d42f73340c58ca6dc141a9eb8e3112b29

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