Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ff7505ec81725d0…

MALICIOUS

PDF

72.8 KB Created: 2021-02-10 07:59:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 40ddee57038ce9e7d2945cf19b238a14 SHA-1: f56aa3edd096adaa31707fcbee37c2dd44f6832d SHA-256: 2ff7505ec81725d07913cad85fd9715fef87e4d32cb0303ab6b385e0197b61ab
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, many pointing to disposable hosting, and the document body suggests a lure for downloading movies. The presence of multiple PDF_URI heuristics indicates a link farm designed to redirect users to other potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/123?utm_term=full+hd+1080p+hollywood+movies+free+download+dual+audio+worldfree4u PDF link annotation
    • http://microdigitalmeter.xyz/gi_tr_hiu_dng_ca_hiu_in_thr9qkw.pdfIn PDF document text
    • http://tiktokfrance.fun/21376985910v5nbt.pdfIn PDF document text
    • https://cdn.sqhk.co/veletafi/hfvigjf/cares_child_care_scholarship_parent_application.pdfIn PDF document text
    • https://vukezozonobobex.weebly.com/uploads/1/3/1/3/131383599/9561427.pdfIn PDF document text
    • http://koguvagad.22web.org/vomesepugidajafa.pdfIn PDF document text
    • https://cdn.sqhk.co/mivijigonof/cjhhhcb/easy_origami_flower_instructions_step_by_step.pdfIn PDF document text
    • http://xapizokawe.iblogger.org/email_template_pixel_size.pdfIn PDF document text
    • https://cdn.sqhk.co/zewuxumaro/hdQiijg/highway_patrol_office_meridian_ms.pdfIn PDF document text
    • http://tibetterrier.ru/vavorthuvb.pdfIn PDF document text
    • https://valezuxaj.weebly.com/uploads/1/3/4/6/134650604/5714448.pdfIn PDF document text
    • http://elerctum.org/jazz_drum_sheet_musicd2qae.pdfIn PDF document text
    • http://antinomi.design/soldiers_of_fortune_2_torrent45lew.pdfIn PDF document text
    • https://kexulisil.weebly.com/uploads/1/3/4/7/134762119/tuvipezapesi.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/fajetufekejo/cadillac_srx_2004_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/nitujesikogaramogut.pdfIn PDF document text
    • http://kesobikifa.epizy.com/blackberry_bold_9700_mobile_whatsapp.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_off0000dca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA7 5968 bytes
SHA-256: 30cbea8ff3d450b79272b69fd696ca1439cb8ec3f0f83326bdc74ac72f501a14
font_01_sfnt_off0000f0f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F6 11328 bytes
SHA-256: ab6e0496237c662c1150df0a48e305082b88129d03371bec1e4371b1f34f05a7

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