Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ef963ca99ff5c2b…

MALICIOUS

PDF

44.8 KB Created: 2021-03-11 20:32:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: bb73e051b60b4ba3acd148c837adde45 SHA-1: ac47ae97688ff88d23310b0145ca40b0fdbe8693 SHA-256: 4ef963ca99ff5c2b01f91f0d66572312098c4e29ad3e6d6b68e59d07e8aee1f1
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many pointing to disposable hosting, suggesting a link farm for SEO manipulation or to host malicious content. The ClamAV detection and ML classifier indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest potential for JavaScript execution (T1059.007) to facilitate the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7134

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://fokemale.ru/award?keyword=best+pdf+app+windows+10 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4403804/normal_5fee9e63425dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388814/normal_5fd294e154599.pdfIn PDF document text
    • https://nurosizakudagag.weebly.com/uploads/1/3/4/6/134699554/bukazimor.pdfIn PDF document text
    • https://wexubowepupewaw.weebly.com/uploads/1/3/1/8/131856394/lawiledoj-bupeteg-nibewamobi-bukiwema.pdfIn PDF document text
    • https://tisitijalazog.weebly.com/uploads/1/3/6/0/136017937/tiditujanosesedumif.pdfIn PDF document text
    • https://fiziwiminika.weebly.com/uploads/1/3/4/6/134686918/tipote.pdfIn PDF document text
    • https://rebazizezasij.weebly.com/uploads/1/3/4/5/134586802/6259300.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416128/normal_5fec9a2393a14.pdfIn PDF document text
    • https://walowopus.weebly.com/uploads/1/3/5/2/135295279/4162564.pdfIn PDF document text
    • https://sojurepew.weebly.com/uploads/1/3/5/9/135992925/7147534.pdfIn PDF document text
    • https://morarinaxi.weebly.com/uploads/1/3/4/5/134528003/fd48bb60.pdfIn PDF document text
    • https://pidexijot.weebly.com/uploads/1/3/5/3/135316959/nerar-nujolenigezite.pdfIn PDF document text
    • https://devumevone.weebly.com/uploads/1/3/4/5/134589636/pinik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418556/normal_5fd1c3b4517d7.pdfIn PDF document text
    • https://zafubunemajuz.weebly.com/uploads/1/3/5/3/135314528/xebagasu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495707/normal_5fe77646a55e5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6cba530b-4733-4b85-b845-05c3ad610f86/can_police_track_old_snapchats.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32142600-07df-4c0a-b550-9556ebb1e617/tineku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f15226e-050a-40b5-9f3d-102bed49b975/story_of_your_life_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a571ab4-2477-4505-ad48-86e16e62204a/22649383020.pdfIn PDF document text
    • https://617ecdd3-9f15-4ef5-8539-b0e2931b4c86.filesusr.com/ugd/55f640_42ee90d4b27f42528e737b53d3c74e7d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/70a1cf13-ff3d-4dd2-8ab5-04aafd238656/baby_girl_dresses_boutique_india.pdfIn PDF document text
    • https://6d8b2927-5c4d-40df-b593-c6bd35e19528.filesusr.com/ugd/1adac8_4ca82571b0f54bd7ba952b40100369a3.pdf?index=trueIn PDF document text
    • https://cae2aa39-5014-47ec-b549-0fed73f36d02.filesusr.com/ugd/c8683e_7f7f04c4cc5540bf8480edc35e5fee57.pdf?index=trueIn PDF document text

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