Malicious PDF — malware analysis report

Static analysis result for SHA-256 44bccaf7c337d49a…

MALICIOUS

PDF

81.5 KB Created: 2021-03-23 15:49:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 28d794e107b3301e53c35b6be0574f11 SHA-1: c5bdf5cc743d8cac45335e46bbd758fad14155bb SHA-256: 44bccaf7c337d49aa900c82ef4b5b3c8610b64d317cf558ed20401d4fd8e13d5
186 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a phishing or malware distribution lure, indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The embedded URLs, particularly the one pointing to 'xezojetit.ru', are suspicious and likely lead to malicious content. The ML classifier and ClamAV detection further support its malicious nature, suggesting it's a phishing or trojanized document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://xezojetit.ru/strik?utm_term=nook+bntv600+network+problem PDF link annotation
    • http://zinuxuf.22web.org/cheat_capsa_susun_topfun_game_mod_apk.pdfIn PDF document text
    • http://normaa-id.com/kmp_media_player_for_windows_77qiut.pdfIn PDF document text
    • http://fukijuwevo.getenjoyment.net/8516601552.pdfIn PDF document text
    • http://rorasilozaput.22web.org/85520321959.pdfIn PDF document text
    • http://mihetos.xyz/rajusukeminab6xmsg.pdfIn PDF document text
    • http://buybritishcat.com/boatswain_mate_manual_answers4n0bg.pdfIn PDF document text
    • http://copyright-securityx.com/jisitogudisudedumukekemekmqk7j.pdfIn PDF document text
    • http://sesizuxewewax.mygamesonline.org/zudeti.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8df9d1b7-8f6e-49e1-bdac-c9da4d4291fd.filesusr.com/ugd/12c198_6b79e84552b043889f3536cbc6785573.pdf?index=trueIn PDF document text
    • http://rasiritodir.rf.gd/9178276139.pdfIn PDF document text
    • https://f87ce62f-3d5d-4c42-bff3-2e7d00444551.filesusr.com/ugd/72ed28_c47e38c55b784d16b5829f53766ad554.pdf?index=trueIn PDF document text
    • https://eb62986f-0112-409a-9ebe-777412bc5c19.filesusr.com/ugd/26938b_560888fcddb14b188e545bb3d1bef36a.pdf?index=trueIn PDF document text
    • http://renowuvix.epizy.com/always_on_display_service_apk.pdfIn PDF document text
    • http://xedavabawavela.onlinewebshop.net/personal_selling_process.pdfIn PDF document text
    • https://f733e552-90a1-4d1f-83ca-a6b36afcf31c.filesusr.com/ugd/38bf1f_d218634f6b104ae8ad9c8c9a912eca21.pdf?index=trueIn PDF document text
    • https://9e77dbea-16d6-438e-9859-4a68c5388828.filesusr.com/ugd/3225da_ad81b6d8f2ae4065922ca9c85903617c.pdf?index=trueIn PDF document text
    • https://ffcd7f67-9b43-45c2-8e44-b15cca9583b8.filesusr.com/ugd/48bf55_444afc1c3b7d427bbd4b00ce30bb3885.pdf?index=trueIn PDF document text
    • https://ab737b70-891a-4a1f-8db9-ee548211cb31.filesusr.com/ugd/ce14f3_be6970645d974b78aeb5878a18636346.pdf?index=trueIn PDF document text
    • http://mutodilevo.epizy.com/59077712440.pdfIn PDF document text
    • http://babefuv.epizy.com/53583280962.pdfIn PDF document text
    • https://43a2ba88-5de9-465b-b95f-6a4d82f2d06e.filesusr.com/ugd/dcbeda_bb7df62005204e27984ec415cca03b46.pdf?index=trueIn PDF document text
    • https://0bef8565-087b-457a-960c-b0529baba50c.filesusr.com/ugd/638000_dcc1d8c203bb4c82a4ebdcc179c6720f.pdf?index=trueIn 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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BC 5200 bytes
SHA-256: 9ed7922b64d1e31494c7810e36ad73e6160f357695a997d4e1756dd50555df6e
font_01_sfnt_off00011274.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11274 11020 bytes
SHA-256: f9a66a5f27153e61965e8b49a1581d257fab6918c51d9806e170291e4a64cce8

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