Malicious PDF — malware analysis report

Static analysis result for SHA-256 208efc7a7a496241…

MALICIOUS

PDF

73.8 KB Created: 2021-05-24 17:47:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 358151f4777b15421daba6cf54b3e55c SHA-1: a8cdca473b9afd2e436082fb19e19bcb834b542b SHA-256: 208efc7a7a49624133e3856884139c5b86d51985093b2f8983405e1c4a034be4
196 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 prominent one pointing to 'https://mezovovuduw.ru/strik?utm_term=how+to+remove+mendeley+from+word+mac'. This URL, combined with the heuristic 'PDF_SEO_UTM_REDIRECTOR_LINK', strongly suggests a phishing or malware distribution lure. The ML classifier and ClamAV detection further confirm its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://mezovuduw.ru/strik?utm_term=how+to+remove+mendeley+from+word+mac PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445736/normal_5fd30a9ae0edb.pdfIn PDF document text
    • https://susakatevasek.weebly.com/uploads/1/3/4/8/134871092/degileminimopamufivo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390383/normal_601e3b15613f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380090/normal_6019190e08a99.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384142/normal_5fec635b489ea.pdfIn PDF document text
    • https://laxepesijuniz.weebly.com/uploads/1/3/1/3/131383562/ledaredibigejegafag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390350/normal_606064e52750d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/35d88ca5-1ead-45a1-ab97-83f8ea879b56/93460506953.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69dc701e-c15d-405f-8ea9-1f41fb0adc8d/how_to_fix_capitalism_porter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6f54907-39b9-4b11-829f-4fddb494771c/bash_scripting_tutorial_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f917a25-b63d-4181-b62f-d04e703661c3/neuro_emotional_technique_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/tamovagag/69461093331.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8411a446-cabc-412c-ba61-038ae1d0d292/94283863035.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63045586-0192-4c06-9ad2-a0121b4a8ab0/rigifekuza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/712514e4-04a1-4d3d-93f9-b8e00883133c/beleruzonizimotuxakuwerej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3b6b26b-597a-46a1-abb0-645294d40168/new_moon_edwards_pov_stephenie_meyer.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/13025277466.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e24f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24F 5204 bytes
SHA-256: aa14fcfd6b86bc6fe2016498c4666699172393ffb7a3d913fe098ba20e0b014e
font_01_sfnt_off0000f408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF408 10592 bytes
SHA-256: c51b11443a47a313ddb024fcb14eb3eccf489a211f70948062d95c081bac2a76

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