Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab02b49a1718acc6…

MALICIOUS

PDF

77.7 KB Created: 2021-03-11 12:29:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 4d5a0f3331a6e4439e1e732a6337a35e SHA-1: 7d04a5c54f0f25d74ac4061caac0a6bb3936490c SHA-256: ab02b49a1718acc6ea07e18d4ea7f7f5d82a4daaeb460ee0b0319b49431c6e87
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized and point to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • 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://dugedepap.ru/award?keyword=electrical+load+calculation+for+building+design+pdf PDF link annotation
    • http://tapuxuwurumar.22web.org/39695240954.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389097/normal_5fde349d7b7f8.pdfIn PDF document text
    • http://kusafomidufe.mywebcommunity.org/what_song_goes_memories_bring_back_memories_synonym.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415739/normal_5fcc44685ccd1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420037/normal_602667da8c548.pdfIn PDF document text
    • http://bawagel.22web.org/the_forty_rules_of_love_summary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366050/normal_5fd76b05e8fb3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3115d536-3236-45e0-8d67-e34a70756102/sir_gawain_and_the_green_knight_part_3_and_4_summary.pdfIn PDF document text
    • https://c03439ef-6557-4199-865e-586791a52b6c.filesusr.com/ugd/6bb4a2_907f9a585598450696dc134eaeae260e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/1749273508.pdfIn PDF document text
    • http://mipuvofelope.epizy.com/notaxenoxulukar.pdfIn PDF document text
    • https://s3.amazonaws.com/tazibabebamep/volume_booster_free_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/jogetunu.pdfIn PDF document text
    • http://xodenumaverap.epizy.com/14451596185.pdfIn PDF document text
    • https://s3.amazonaws.com/kubedukowug/7957576525.pdfIn PDF document text
    • https://1e16da7b-5b4f-4122-a3c4-5c88c9d97cf7.filesusr.com/ugd/83f04e_3a490671c07f4aa4bc1ad79b8c2a6ace.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b06d23cf-86df-4849-ab23-c5ec9c1b4957/kirby_vacuum_cleaner_supplies_near_me.pdfIn PDF document text
    • http://nononulavojiki.myartsonline.com/cesur_yeni_dnya_oku.pdfIn PDF document text
    • http://pusebirenox.myartsonline.com/tepugikevekasipitis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/205078fe-b608-46db-afaf-5d9322b1d074/mucusless_diet_healing_system_spira.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/amigos_para_siempre_partitura_piano.pdfIn PDF document text
    • https://45b0b119-5f8c-43e7-b437-4e12d17c1c81.filesusr.com/ugd/3826db_180c8af5f946401ba11e4beaac78b479.pdf?index=trueIn PDF document text
    • https://6843e3eb-5573-46e1-90a0-370cfc2b4a0d.filesusr.com/ugd/89b1bc_f08fbca0a5974c7491cd1fd5938d3569.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_off0000f1ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FF 5420 bytes
SHA-256: 5f8bb077dcb64ecf98aa03c2db758287b773290951e0b21c84864733c3d02ab5
font_01_sfnt_off0001047a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047A 10728 bytes
SHA-256: bff707aa05b32eda75b258cb6e2ae56f5479d8017bb231c8f9315af845ed875b

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