Malicious PDF — malware analysis report

Static analysis result for SHA-256 96c7fb00c0dc6131…

MALICIOUS

PDF

73.0 KB Created: 2020-11-20 03:48:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: fbdf32cc49b82265adebc09483188db9 SHA-1: 53be39fc6d8924d9ff99dcad0f90b5698b998813 SHA-256: 96c7fb00c0dc61319a7a0a1aaf9697cfe84c43063342c9a9fb237b09f5739454
214 Risk Score
Tags
free-cdn-ebook-manual-lure

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 embeds a large number of external links characteristic of an SEO link farm and 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 0.9997

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://traffmen.ru/aws?utm_term=partnership+deed+form+b In PDF document text
    • https://vunesexub.weebly.com/uploads/1/3/4/4/134442538/0ca908e9b1f16d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371788/normal_5f928b5d4bce6.pdfIn PDF document text
    • https://pituluwo.weebly.com/uploads/1/3/1/4/131437949/9493648.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379489/normal_5f90b49f70c38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393632/normal_5f92673f62472.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386597/normal_5f9fa67cde356.pdfIn PDF document text
    • https://mipirizu.weebly.com/uploads/1/3/2/6/132682564/jinatufisile_wimunedujeni_weviboga.pdfIn PDF document text
    • https://wesafave.weebly.com/uploads/1/3/4/3/134307961/rusazolufowovuwuwoma.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453909/normal_5fa08b929aa2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388050/normal_5f91a7b48dadb.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/joterige/sikowazudefeximiraso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d766d706-0bee-49bd-8cb8-a8c32cf4ad69/dafora.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cc34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC34 5388 bytes
SHA-256: 4cd3bd1b238fba02eca086639f97f5cc3b3e14fa4be23d7b4b849d0daf4f2add
font_01_sfnt_off0000de5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE5B 10384 bytes
SHA-256: 9d12492a5e236253b7ac2cdc39e12e15644898076bf91a82740bfe57cc06535a
font_02_sfnt_off00010205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10205 16164 bytes
SHA-256: 6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3

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