Malicious PDF — malware analysis report

Static analysis result for SHA-256 701a7373fd93e23a…

MALICIOUS

PDF

54.3 KB Created: 2021-06-11 06:31:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d24b8f4e321edd57455e73a8f45e3885 SHA-1: 23ebfe38f5670da1152fc4debe6b0c34491d78fd SHA-256: 701a7373fd93e23a998f3e69864b01de3f59513588cd8a985ebbf9a2e3cdd0ae
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier indicate malicious intent, likely related to phishing or malware distribution. The document's content, though heavily obfuscated, appears to be a lure for a grammar worksheet, which is a common pretext for such attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8985

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://infrive.ru/pbw?utm_term=worksheet+of+grammar+for+class+1 PDF link annotation
    • https://momiretet.weebly.com/uploads/1/3/5/3/135345559/ribibewux.pdfIn PDF document text
    • https://jiwazumirinupe.weebly.com/uploads/1/3/4/3/134352382/7de688de11f87.pdfIn PDF document text
    • https://tofisijola.weebly.com/uploads/1/3/4/8/134863845/jolakezoduwi-nolew-sejutela.pdfIn PDF document text
    • https://jipenudus.weebly.com/uploads/1/3/1/4/131406532/lozeli.pdfIn PDF document text
    • https://papadapogapov.weebly.com/uploads/1/3/4/7/134706375/9974563.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420260/normal_60b7e1b933bdf.pdfIn PDF document text
    • https://puwegamojone.weebly.com/uploads/1/3/4/7/134702565/nakimevovomoja_nodakuduxip_juwofomisesiva_zejofegufe.pdfIn PDF document text
    • https://xameramavojipav.weebly.com/uploads/1/3/4/2/134265998/zuxosanedav_veviza_pewonisatu_pinupikavebawir.pdfIn PDF document text
    • https://wubugivaruj.weebly.com/uploads/1/3/4/6/134669137/baguvegeva.pdfIn PDF document text
    • https://vanonages.weebly.com/uploads/1/3/6/0/136083008/dotelakilonevem_gumifunobewet_muxarexevot.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385848/normal_5ff2220333d59.pdfIn PDF document text
    • https://savapavazatu.weebly.com/uploads/1/3/4/6/134677348/gibegawarudedanumiz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495043/normal_60c1f75ac6a7d.pdfIn PDF document text
    • https://bejixetixozivi.weebly.com/uploads/1/3/4/4/134499198/lakidurudawese-mawigepiranof-lojuz-pitudime.pdfIn PDF document text
    • http://bujolajoxek.pbworks.com/w/file/fetch/144530190/8.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4ab867f-5f57-4e45-9765-0c40924c73ae/how_many_carbs_are_in_dunkin_donuts_cinnamon_roll_coffee.pdfIn PDF document text
    • http://medodadepud.pbworks.com/f/69075424020.pdfIn PDF document text
    • http://gosirata.pbworks.com/f/lijedaxelev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf124143-e591-4ce2-afe2-73627849072a/50324822317.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d42ac4b-ffe0-4c07-9c23-23f1b6c29424/why_does_my_computer_say_no_internet_when_connected_to_hotspot.pdfIn PDF document text

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