Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b5d5724b1d94f53…

MALICIOUS

PDF

74.8 KB Created: 2020-12-24 23:29:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5e4f07356ef2d42fecb9207d142b6f16 SHA-1: 96b1b31beed50c7d4cd72d910fcda3a4f13a2373 SHA-256: 7b5d5724b1d94f53a6cb9548fdeec9913e212bf103639a1d6d2ed72e0f58b48d
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, with a significant heuristic firing indicating a 'PDF_SEO_LINK_FARM'. One of the embedded URLs, 'https://traffine.ru/strik?utm_term=ice+cream+truck+music+origin', suggests a potential phishing or spam campaign. The ClamAV detection and ML classifier also flag this PDF as malicious, likely due to its link-farming behavior and potential for distributing further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffine.ru/strik?utm_term=ice+cream+truck+music+origin PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417129/normal_5fb62c692cef9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419225/normal_5fc3da687dd9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376856/normal_5f8b530c38989.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409797/normal_5fa7b4eb049e0.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/f63037cecb5.pdfIn PDF document text
    • https://sigogaxeba.weebly.com/uploads/1/3/4/6/134620414/dasib-reniz-birerelemo-dukofitim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374522/normal_5f893b4e207d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376098/normal_5fae9b5d80baf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369191/normal_5fc206ec4f3f9.pdfIn PDF document text
    • https://xezorilim.weebly.com/uploads/1/3/4/5/134588859/xileli-wajafom-xasejujidofoza-ruzoridurek.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/sesijesule/grading_rubric_template_for_presentations.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/21874517391.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/badoo_apk_mod_latest.pdfIn PDF document text
    • https://s3.amazonaws.com/vutame/tidafevonimilenolozije.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8AB 5088 bytes
SHA-256: 2bf8da66c7328c5c36d04bc520e904e2d40a45a503da22161eef2d6d54e22586
font_01_sfnt_off0000f9e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E3 10596 bytes
SHA-256: 30ff7598863e00d2670a428c7be2f740bf7586cff522631707ea0b09ea34962b

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