Malicious PDF — malware analysis report

Static analysis result for SHA-256 2be27772dba4d717…

MALICIOUS

PDF

151.3 KB Created: 2021-03-16 00:29:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: cdd3a101bb6d9c7a22edc153a546ce71 SHA-1: efb458b5ae9746733f3d6e35f7fe8cef714aaec3 SHA-256: 2be27772dba4d71794c2eaa1c593504f864386ed46e58b4d426af83c7f4ddf1c
134 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, with one specifically pointing to a suspicious domain 'druttle.ru'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, suggesting a phishing or spamming operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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.
  • 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://druttle.ru/123?utm_term=baahubali+2+film PDF link annotation
    • https://cdn.sqhk.co/ditetijesi/jcifCjh/dinosaur_simulator_dino_world_game_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418556/normal_601001cb73ea5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390092/normal_5fde79fa2d12f.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/gabefagezegunamikigujoz.pdfIn PDF document text
    • https://cdn.sqhk.co/mofosalamo/WEY0vge/susite.pdfIn PDF document text
    • https://cdn.sqhk.co/bufomofa/jfia4gg/the_muffin_man_song_mp3_download.pdfIn PDF document text
    • http://sibatike.getenjoyment.net/are_runts_candy_gluten_free.pdfIn PDF document text
    • http://tafugegajotu.mygamesonline.org/how_much_do_physical_therapists_make_monthly.pdfIn PDF document text
    • http://gexomafe.mypressonline.com/rezijogurudekupupedasu.pdfIn PDF document text
    • https://cdn.sqhk.co/dubagojovo/FiegcrG/bail_information_form.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/h5ia1Hg/76643375233.pdfIn PDF document text
    • https://cdn.sqhk.co/moxawitab/JegghiL/360_vr_horror.pdfIn PDF document text
    • https://cdn.sqhk.co/rawavuzom/Bhajdhg/96326707013.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/68936041659.pdfIn PDF document text
    • https://0298dc5a-7924-4276-8279-06452a5288da.filesusr.com/ugd/b30cf0_b54287099e4348d6aee8fa2a568b3d9c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fizaxo/modern_history_of_india_spectrum.pdfIn PDF document text
    • https://57fc24c6-ba7c-430a-bdae-05304608b610.filesusr.com/ugd/bc9c68_de8b2ad47da64262b0e0171855b78e24.pdf?index=trueIn PDF document text
    • http://nufiwimuzobo.onlinewebshop.net/49697358186.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/rasaturutozavif.pdfIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001d0c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D0C6 13584 bytes
SHA-256: c7b684276d8a7c3229f765275c439185c91d74d1bfc7351983c225b94caa6f69
font_01_sfnt_off0001fd5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FD5A 5052 bytes
SHA-256: 36c0e2ebac826434e88f216ad4cc56e5fce8cad504623416b5600ce5081fd7d5
font_02_sfnt_off00020e6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20E6E 12684 bytes
SHA-256: 27158479b6276e196e0febbc5235d4439d4fd6175e0a2a4c47377497a0ff11c0
font_03_sfnt_off000239b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x239B5 16276 bytes
SHA-256: 4228f82539f17c4c6837ac4473a9d3638ba0ab91d66ad2a553650a15ce31fa53

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