Malicious PDF — malware analysis report

Static analysis result for SHA-256 bad66f7c516370c5…

MALICIOUS

PDF

76.6 KB Created: 2021-06-13 14:02:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: ebc5eb3bb8ee5879f4cf282a064b1676 SHA-1: aaa7ea9f51b077f0d0142979f38d0e9018a6440e SHA-256: bad66f7c516370c57297283e717972c353edf00d441e42fb963ba85aeb998523
156 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 to other PDF files, suggesting a link farm or SEO manipulation tactic. The presence of a critical heuristic firing for PDF_SEO_LINK_FARM and ClamAV detection as Pdf.Phishing.Trojan indicates malicious intent. The document body, though heavily obfuscated, contains text related to 'Apaharan web free download', reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://huntic.ru/pbw?utm_term=apaharan+web+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470222/normal_60bfbb348254f.pdfIn PDF document text
    • https://movakesomerinid.weebly.com/uploads/1/3/4/5/134528648/fcc0e.pdfIn PDF document text
    • https://wovukevaz.weebly.com/uploads/1/3/4/5/134523328/9838560.pdfIn PDF document text
    • https://pepuzategazeg.weebly.com/uploads/1/3/1/4/131453576/1a3589b5098cd.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4373519/normal_60b7474cbfe8c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/7e4c7f10-2a09-455b-bf8f-2e7c2cbe1f43/problemas_de_estequiometria_4o_eso_resueltos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa9f1518-fc43-485d-b709-142e2eac3d6e/tarisupidu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fea9db13-f9a2-4913-9dae-f300f4061111/vampire_diaries_season_8_episode_9_english_subtitles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82233632-1cf1-411f-a31b-302d073ed4e0/saitek_x52_pro_ps2_cable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffa731cf-93c0-4cbb-baf6-5e3f06263a26/a_visit_from_the_goon_squad_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17e77541-c889-424a-8ec7-cf6518ffb538/ejemplos_de_los_pronombres_relativos_en_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c010e33-44ef-43ad-ae62-7809ac7a804e/rusajig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f819cc4-7aac-4f26-aaa4-075bdf4ab4ef/task_scheduler_exit_code_0x3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e6a12a3-4fd1-48ce-bb10-b5eefa20504f/latest_cv_format_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a82005e4-5189-4c7b-8e46-84fa7434a4f0/breville_juice_fountain_elite_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e418cfd-23e1-40f5-8dde-1f88333dd586/ravpower_61w_pd_3.0_gan_wall_charger_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f42960e1-99a9-4c7f-8fb7-4e0058fa7896/faporozanorikokeguteravi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE245 4832 bytes
SHA-256: 60d74a62f1212c6a73c7b038e7a63d36709cd925e87b618a6d5a4142d344ec4e
font_01_sfnt_off0000f2a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A4 10828 bytes
SHA-256: 075d06db325c8376750aa147cbe5d585566ea4bb7cc493f266d404885d27c195
font_02_sfnt_off00011775.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11775 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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