Malicious PDF — malware analysis report

Static analysis result for SHA-256 85bc6caf13daef48…

MALICIOUS

PDF

95.6 KB Created: 2021-01-15 20:29:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: bbe3f23435e0310b36569164ca5b2ccc SHA-1: 49774cb97fb1a0733361abda9a0b6e081daa723d SHA-256: 85bc6caf13daef48260a7ce31927ade8cf455c2522848382a778e7732f2c91c7
156 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, indicating a phishing or trojan payload. It contains a large number of external links, many pointing to other PDFs, suggesting a link farm or SEO manipulation tactic. The embedded URLs are likely used to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/123?utm_term=functional+hypertrophy+training+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444636/normal_5fa43e5668413.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377120/normal_5ff104b104b7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365583/normal_5fe9cc4d3ee35.pdfIn PDF document text
    • https://puwexisafiza.weebly.com/uploads/1/3/4/5/134586360/3451570.pdfIn PDF document text
    • https://joriwonakogilul.weebly.com/uploads/1/3/5/3/135305945/7396169.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366400/normal_5fbe209989bc2.pdfIn PDF document text
    • https://site-1177275.mozfiles.com/files/1177275/3481630950.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368240/normal_5fc7f2ce9b273.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376358/normal_5fcb2558542f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418556/normal_5f9d8cdfde1fb.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/tixeligufokup/sapimiwok.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/south_failsworth_primary_school_ofsted_report.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE0 5296 bytes
SHA-256: e337d19e2001f86387d7d50f858aa7b6725e70a25c9b6c1df481c37aede42363
font_01_sfnt_off00012ce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE4 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off00013571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13571 11024 bytes
SHA-256: edff7d7a025724f96cb863bdb3fa8ce3f657baa27558d22f34453fab9ca92d09
font_03_sfnt_off00015b5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B5A 16376 bytes
SHA-256: 069f5cdcb972b33999f3dc18a3e5b847fc2aa024b7c5b45b4734cedf253a8e5c

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