Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7b41a8099093613…

MALICIOUS

PDF

89.5 KB Created: 2021-03-22 17:57:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 1284caf64e2cde7ce122c343628d5e8e SHA-1: eb73da99e35951e985f58b18a2788722f6273e2b SHA-256: b7b41a8099093613365a120730248a384b8fc0a91412fd114db8ec3cf7f418ba
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a high ML score and ClamAV detection. It contains numerous embedded URLs, with one pointing to 'soxebez.ru', suggesting a phishing or malware distribution attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm on disposable hosting, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 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://soxebez.ru/wix?keyword=summit+international+school+of+ministry+cult PDF link annotation
    • http://erethiztzj.space/business_english_books_freetl1an.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463830/normal_6002772898f6d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367287/normal_5fe5360d62c86.pdfIn PDF document text
    • http://idealicaitalia.website/wopuvegikepomaxo9u06x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486994/normal_6022d15baf57a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463552/normal_5ffcfd15a1b61.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495988/normal_601dbcbff180a.pdfIn PDF document text
    • http://qupieasy.online/arborist_tree_climbing_techniquesqws5g.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404103/normal_5ff60a9fe1b3b.pdfIn PDF document text
    • http://smm-target.ru/how_to_use_a_loom_to_make_a_baby_blanketzorig.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403816/normal_60121f2fc8a64.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443325/normal_6040d61d1e215.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/wunojipu/darth_plagueis_portugues.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0289f5e2-e62d-4cfd-acd6-41624cc5d49a/should_i_get_the_gopro_hero_7_black_or_silver.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/boston_scientific_latitude_6290_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/892be163-f349-4a6a-8f86-fac145f13de3/dawibixetunibir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67e8ace4-c1b7-471d-a090-be12874bbbec/how_to_turn_on_a_yeti_microphone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5959a3a-f3f3-488d-8a63-0ac0c0ef8ca7/12514323513.pdfIn PDF document text
    • https://s3.amazonaws.com/mozedijiz/yii2_gridview_pagination_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23475e22-c8d2-4d8a-91da-6ea3533df12b/manarebanul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c7132ed-085e-412e-908e-3bec2204c12d/rukuraf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acf12c2d-7f0f-4403-a492-fadff436e5cd/torusenolurowovoluneru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d245c9e5-e6c9-4b0a-aacb-401a3f191cb7/zojofatufi.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/when_dimple_met_rishi_story_ending.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea77d199-333c-4080-bca0-93370ccb1573/52683791505.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be0cad37-4b7e-4e50-9c75-6cdbbd169d73/99369774884.pdfIn PDF document text
    • https://s3.amazonaws.com/xofalepelala/widijuxi.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_off00011d85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D85 5324 bytes
SHA-256: dd0758e0939d81b381075ee24df91baf6949f1c002b63c317ec1de76a604b63a
font_01_sfnt_off00012f7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F7C 11224 bytes
SHA-256: 0f171c95284aee76346df118f6d5b11a28284b875e4ca95e9f87e57ef3189f72