Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd8d17f77c90bd0f…

MALICIOUS

PDF

51.7 KB Created: 2021-03-22 00:18:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 887c6a83e02fc29d6f0661012f09efda SHA-1: 62a87a71dc9f321222b22f31f5202901afe8b7cc SHA-256: bd8d17f77c90bd0f8edb86902ad8f862649f4c718a53f267ff564363dc14f3e1
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, typical of phishing campaigns, and contains numerous external links, many hosted on disposable domains. ClamAV and ML classifiers also flagged it as malicious. The primary external URI, https://xajibur.ru/award?keyword=sap+accounting+software+training+pdf, is likely the intended destination for the user after being tricked by the document's appearance.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7206

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 51 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://xajibur.ru/award?keyword=sap+accounting+software+training+pdf
    • https://cdn-cms.f-static.net/uploads/4366347/normal_6026e36014397.pdf
    • https://cdn-cms.f-static.net/uploads/4420025/normal_5fea01ae3798f.pdf
    • https://gikesusemu.weebly.com/uploads/1/3/4/7/134775173/firomajilara-taxitujut.pdf
    • http://xedijama.getenjoyment.net/26841267422.pdf
    • http://mesikigodijope.mypressonline.com/liberty_bin_sachivalay_clerk_book_2020.pdf
    • https://ranelelopo.weebly.com/uploads/1/3/1/3/131380755/wilal-mopesiri-zalefigejam-kudaxosaf.pdf
    • http://sasawavivar.mygamesonline.org/slave_trade_in_zanzibar.pdf
    • http://tebaputazaxuva.myartsonline.com/mefoloj.pdf
    • https://359ea524-acbf-40a7-8d58-ee96a8f10bc8.filesusr.com/ugd/ca2e76_2d378123b51e406695f0d4978ba33360.pdf?index=true
    • https://s3.amazonaws.com/genukopapovixo/android-_x86_8._1-_rc1_oreo_virtualbox.pdf
    • https://4a5660cc-52a2-48ff-9acb-4b4f1704cb6e.filesusr.com/ugd/81868d_753685dea3f14d7099bd3a3110c2fc1e.pdf?index=true
    • http://kavibajegis.onlinewebshop.net/the_lottery_by_shirley_jackson_short_summary.pdf
    • http://rivenoke.onlinewebshop.net/materi_barisan_dan_deret_kelas_9.pdf
    • http://zaxuzut.atwebpages.com/apache_hive_book.pdf
    • https://s3.amazonaws.com/xeponodij/80491282653.pdf
    • https://s3.amazonaws.com/nisiwanolom/dometic_thermostat_user_manual.pdf
    • https://s3.amazonaws.com/redegelesibif/belerick_guide_ml.pdf
    • https://98be45bc-63b9-4117-aff7-84a3d4f2c4a0.filesusr.com/ugd/90c678_9f66c1c254664a8fa1399d7f92cf36d6.pdf?index=true
    • https://ed8cecbe-9888-40ab-9384-4b5b2efda5e6.filesusr.com/ugd/22dd42_bef5261fcb86486fabfb3f3944be9ed3.pdf?index=true
    • https://b7e73dfe-ad35-4791-b4f7-7500f5b7882c.filesusr.com/ugd/bc79a4_e211fa793d9c4fa0bb63ebff579adcc0.pdf?index=true

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