Malicious PDF — malware analysis report

Static analysis result for SHA-256 f25664935591068d…

MALICIOUS

PDF

69.0 KB Created: 2020-12-26 22:03:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 0d0a3b2f0721110ef0a0b6a5e8b5ee46 SHA-1: 91d4b1141fc87a45af51a41cb9a5c46a0b13a4e8 SHA-256: f25664935591068d29ebe1f78f23bd79d6508c0461773c05ce3bcf5984e6b4c3
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, a common tactic for link farms or phishing campaigns. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically as a phishing or trojan delivery mechanism. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristics suggest it's designed to redirect users to potentially harmful external sites.

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
  • 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://trafftec.ru/aws?utm_term=jobsdb+compensation+and+benefit+survey+report+2018 PDF link annotation
    • https://foduzivanikatik.weebly.com/uploads/1/3/4/4/134492938/nujalalitalefi-rekodim-bubanozisof.pdfIn PDF document text
    • https://balogidito.weebly.com/uploads/1/3/4/7/134726556/mepanawituropu.pdfIn PDF document text
    • https://kapefamutom.weebly.com/uploads/1/3/4/8/134849172/ff30606.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375095/normal_5f9ee711db85f.pdfIn PDF document text
    • https://giwaxevo.weebly.com/uploads/1/3/4/6/134644090/8401422.pdfIn PDF document text
    • https://jutivodip.weebly.com/uploads/1/3/4/4/134489611/nobirafe-xekumeb-noxezanesifidi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/fd43521e-a9a1-4974-8cc1-0d74e22e0f10/688_credit_score_mortgage_rate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2eb05482-ac78-41a9-a252-d88d0e834661/joke_of_the_day_in_hindi_latest.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fff3a896-4d69-4d11-93ba-04bd6c69005b/smart_measure_pro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7df0c16-b293-4642-afe0-21884ddfcff0/puzudukebupuzimeburub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b41cb7a3-ca84-4739-9f06-d5b4dbf6adf0/how_to_become_a_barre3_instructor.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC411 5964 bytes
SHA-256: 88dbad1eaf49e6e71473bd69720ad28cb36266a831abb69a60c249bf033a5479
font_01_sfnt_off0000d844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD844 9540 bytes
SHA-256: 54610eb29f21793f51d728b0c8816bd51f9141649ffb4d8afd163a84cd135c3f
font_02_sfnt_off0000f8f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F2 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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