Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d2cfc498e46785e…

MALICIOUS

PDF

75.3 KB Created: 2021-03-08 14:40:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 84b7a696b337a2c752a0e09ede5a7a9a SHA-1: 255ef408ee50037d3fdb2bdceb6cd9df9a2fc45a SHA-256: 8d2cfc498e46785eeffcc8ac43ec7d170c65b227aead11e37472ccff12113724
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with a primary one pointing to 'https://xajibur.ru/wix?keyword=su+manager+pro+apk', suggesting a phishing or malware distribution lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the malicious nature by identifying a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://xajibur.ru/wix?keyword=su+manager+pro+apk PDF link annotation
    • http://sawemawe.mywebcommunity.org/how_to_transfer_a_game_to_another_ps4_account.pdfIn PDF document text
    • http://buytoday.cc/61408494579ue6eo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487184/normal_600e66c4838df.pdfIn PDF document text
    • http://dazolovegom.mygamesonline.org/9665385368.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458148/normal_603600079ab19.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383136/normal_5ff088659ae5b.pdfIn PDF document text
    • http://constructionhouse.info/jasikegezuvutofupireraskgoo7.pdfIn PDF document text
    • http://yourlivehelp.com/ramijizapevofoldx5je.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412570/normal_60309f8ed62b1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bezakimodetores.rf.gd/28500157907.pdfIn PDF document text
    • http://fekamenuzexogam.epizy.com/34112808207.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da575093-a075-4df8-9447-644f5031f3f2/twitter_sports_illustrated_swimsuit.pdfIn PDF document text
    • http://sutexuvidag.myartsonline.com/how_long_to_read_the_handmaids_tale.pdfIn PDF document text
    • https://s3.amazonaws.com/luropiw/judolafenuzinixus.pdfIn PDF document text
    • http://zakivijojinikij.epizy.com/tepujusevunamozugakux.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/netflix_series_the_white_princess.pdfIn PDF document text
    • http://joxamemi.epizy.com/semegigenedugubezimame.pdfIn PDF document text
    • http://bezegorev.epizy.com/renerutimoxiwakakop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9900e5e5-f7f6-4914-99c9-4f32c0d83643/sword_art_online_novel_1.pdfIn PDF document text
    • https://s3.amazonaws.com/tazopaju/96319318607.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC1 5096 bytes
SHA-256: f32dccca27e2a54421c7d06e0a2180861179e78257dd6ad8bdf6221dbd137c30
font_01_sfnt_off0000fd03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD03 10240 bytes
SHA-256: 8c3c23fdb2a051b44d0e22e35075a8d051cd56f7c3e2e3e76b14d37f851eb04a

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