Malicious PDF — malware analysis report

Static analysis result for SHA-256 8964b2d1ec6eb515…

MALICIOUS

PDF

85.4 KB Created: 2021-03-15 07:57:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3fe9d55b0f229f979e19b041e5a3ed9c SHA-1: 9b283c51fd55d23937b4fc3869e90f9c9190c93a SHA-256: 8964b2d1ec6eb515923186bd225f61b90b1c3b736174414f7d67770962b2799d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. It contains a large number of external links, suggesting a link farm or SEO poisoning attempt. The document body, though truncated, contains a title related to contacting editors, which combined with the external links, points towards a phishing or malicious redirection scheme. No scripts were extracted, but the presence of numerous external URLs indicates a likely attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://dafemum.ru/strik?utm_term=how+to+contact+wsj+editors
    • https://xipurewaxo.weebly.com/uploads/1/3/4/7/134759043/wudajow.pdf
    • https://static.s123-cdn-static.com/uploads/4393370/normal_5ff3fbd2cd842.pdf
    • https://falototadapi.weebly.com/uploads/1/3/3/9/133989324/zuzixuz_fugopiri_xofozaz_kopegidarar.pdf
    • https://static.s123-cdn-static.com/uploads/4408481/normal_5ffdfa30adafe.pdf
    • http://lapitubemexidi.mywebcommunity.org/overeating_anonymous_books.pdf
    • https://cdn-cms.f-static.net/uploads/4446286/normal_5fd110e412696.pdf
    • https://cdn-cms.f-static.net/uploads/4486965/normal_600dddb9837d3.pdf
    • http://dexizixefufene.iblogger.org/bigikezujovipuxofevi.pdf
    • http://lubevos.scienceontheweb.net/amitabha_sutra_english.pdf
    • https://xanuvomapimiv.weebly.com/uploads/1/3/4/3/134342034/7964806.pdf
    • https://static.s123-cdn-static.com/uploads/4413363/normal_5fdf66717112a.pdf
    • http://vovevowumusiki.iblogger.org/jo_bich_bajariya_dj_song.pdf
    • https://luzepazokiguj.weebly.com/uploads/1/3/4/3/134396814/megamalukewowumujix.pdf
    • https://xukovijo.weebly.com/uploads/1/3/4/6/134611059/56a5e1.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://gumelojapa.epizy.com/10630733067.pdf
    • https://uploads.strikinglycdn.com/files/1623b6f5-f03a-4f4e-b63d-159b074e5ccc/in_the_woods_tana_french_spoilers.pdf
    • http://gesutebixip.epizy.com/vufidefizumovetuvoxo.pdf
    • https://uploads.strikinglycdn.com/files/f3e73dc2-7456-44e6-afc5-3f65bec12080/why_phone_charger_not_working.pdf
    • https://uploads.strikinglycdn.com/files/88213efb-fc5a-48fd-95a8-a954f2c3197a/terapubotibabobipikawu.pdf
    • https://uploads.strikinglycdn.com/files/e633cebe-3103-4f81-8989-da4c611b1516/7081259513.pdf
    • https://uploads.strikinglycdn.com/files/1a2190e0-9851-4b14-beaf-ee80e39e9a13/wesonupipofolage.pdf
    • http://puvapulugo.onlinewebshop.net/arguing_with_idiots.pdf
    • http://momerulazem.rf.gd/bullet_basya_movie_song.pdf
    • https://uploads.strikinglycdn.com/files/8baf7849-289d-4e6e-95c4-b70297011d62/phoenix_sorcerer_revised.pdf
    • https://uploads.strikinglycdn.com/files/d42ea19c-3db8-4c4e-8743-b9be8fc654ff/weight_watchers_digital_scale_review.pdf
    • http://vekabun.myartsonline.com/derirobomedadera.pdf
    • https://uploads.strikinglycdn.com/files/a2685413-78b5-4d3e-a719-de60a0106e03/g43t-dm1_v_a00_motherboard_bios.pdf
    • https://uploads.strikinglycdn.com/files/deb66db9-1548-4a83-983f-1d3abc8aa05f/how_to_refuse_mail_and_return_to_sender.pdf
    • https://uploads.strikinglycdn.com/files/5ccd8d5e-6524-4b75-aca2-a3dfd06dbedc/how_to_reset_voicemail_on_vtech_phone.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001012c.bin
aff967324827a03ba7dfea70b288e50dce5bb670965f138a569c85d9fa39e7bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x1012C 4816 bytes
font_01_sfnt_off0001119b.bin
880a8f2df2b64815ae06ec40059e330ab2e205d713bc383613a53275401264e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x1119B 11752 bytes
font_02_sfnt_off00013944.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x13944 4324 bytes