Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6efaca6066d66bb…

MALICIOUS

PDF

59.5 KB Created: 2020-11-18 23:13:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7239bbf3fd3b8a1b89e9ded7f6486eb6 SHA-1: d0dc404922a3f848c1e738db1826d457e278dc00 SHA-256: b6efaca6066d66bba3ef9904c8852fe2f2ee868a2cd1d60e53a111e756373445
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://trafficel.ru/strik?utm_term=reusable+lettering+template+crossword+clue PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366398/normal_5f99dcad251a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393515/normal_5f9c473833ff9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420776/normal_5f967529e7770.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379359/normal_5f95564d5777b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420756/normal_5f96d45f22a5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415070/normal_5fa7ab5eae995.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392207/normal_5f95721b05d5d.pdfIn PDF document text
    • https://vosasavowaje.weebly.com/uploads/1/3/4/5/134587316/tozevamosej_gibekexafata_sekaru_tozolima.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377379/normal_5f8a7b7d44140.pdfIn PDF document text
    • https://maguduvogusimog.weebly.com/uploads/1/3/4/5/134583052/35187.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404124/normal_5faa61d4d2fb5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404500/normal_5f94adeb973da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368266/normal_5f8a7846bc6c1.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_off0000ad07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD07 5632 bytes
SHA-256: e8ca4f2dfabc0a64a0af621126dbb5bae398b94ea1aaf00ccce9ade79dbbf4fe
font_01_sfnt_off0000c021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC021 9640 bytes
SHA-256: b499e1c5ab76b1c8c609e8e38c89fa5df75ba2f7b343c13049d085e3cf93f69c

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