Malicious PDF — malware analysis report

Static analysis result for SHA-256 68719467d7e21f72…

MALICIOUS

PDF

87.0 KB Created: 2021-06-02 16:00:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 53a0af8029d20098c282ce01051b9004 SHA-1: e9e3d2d7fdc85939b4b38c7af14d14be8555d5c5 SHA-256: 68719467d7e21f72e46e081a927b6d9ad82681233c623b121cce83e6c20f3036
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are hosted on disposable domains and utilize UTM parameters, indicating a link farm designed for SEO manipulation or phishing. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links point towards an attempt to redirect users to malicious sites, potentially for downloading unwanted software or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9904

Heuristics 6

  • 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
  • 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://wastran.ru/pbw?utm_term=nitro+pdf+pro+7+64+bit+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4471484/normal_60071e1267796.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426942/normal_6055956ecdb4a.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4499660/normal_60b7094c99d1e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375909/normal_5ffdedc739597.pdfIn PDF document text
    • https://xadibepewi.weebly.com/uploads/1/3/4/4/134447443/wibawurowogomemefu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493891/normal_601a1bfab4351.pdfIn PDF document text
    • https://gikejujeg.weebly.com/uploads/1/3/5/9/135966421/kabegu-veboxov-dixogu-terujivi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476427/normal_600fe3e408d73.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387815/normal_600e939ab1f1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446147/normal_5fe909c6c8742.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444623/normal_60166e927b16c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481999/normal_604fa078b1dab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459035/normal_6031e77f31dbf.pdfIn PDF document text
    • https://lakerevuko.weebly.com/uploads/1/3/4/6/134654656/df7712d1d5cd990.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372377/normal_6000312ce6bbf.pdfIn PDF document text
    • https://bumipavadawafez.weebly.com/uploads/1/3/2/7/132710759/8969980.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zezimin.pbworks.com/w/file/fetch/144411642/natim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c617f52-a29b-4a82-a169-df8187e019da/google_home_mini_things_you_can_do.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3954a16-9455-41ba-96cd-384af019ba57/66046136572.pdfIn PDF document text
    • http://sofutikajen.pbworks.com/f/48028299626.pdfIn PDF document text
    • http://mizunebapod.pbworks.com/f/68810087100.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdc7d77f-d1e6-4e1f-a1cb-43b97e0b2a31/free_icloud_activation_bypass_tool_download.pdfIn PDF document text
    • http://jajisaparev.pbworks.com/w/file/fetch/144419487/como_ganar_diamantes_gratis_en_free_fire_en_pc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/146341e4-ae09-48eb-92c6-9d27113f5319/how_to_make_airplane_in_little_alchemy_2_step_by_step.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20cf8ec8-c48b-4e19-a2cb-3743c3c836b7/the_last_song_soundtrack_in_order_season_2.pdfIn PDF document text
    • http://risuxujuvu.pbworks.com/w/file/fetch/144483309/54657025341.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_off0000e3b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B7 3776 bytes
SHA-256: 4aef9a492b979eb601097234f588ca219f0e8c6fa0bc923465bc2d81f85924b8
font_01_sfnt_off0000f134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF134 5380 bytes
SHA-256: 5ca9b669373fe4fe5eb99ef86492831d2ba906e57d23d23d0f501b707a45664a
font_02_sfnt_off000103b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103B2 18380 bytes
SHA-256: f1cccf467503160ffce2b27873a7f958c4609db286b25b7164eedd88ca7351c4
font_03_sfnt_off000133a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133A8 16768 bytes
SHA-256: 47db9a53f92d21aed901cd3f41d84b929f83c523d7e5515c611f3a0aa5151a79

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