Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d0b5d053ede5fc8…

MALICIOUS

PDF

70.7 KB Created: 2021-02-19 06:39:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 691a06608e2ade9d1d1097cfc4f5557f SHA-1: b0e2718304fb4a6cbc0cac6808dde66c90a2ee92 SHA-256: 3d0b5d053ede5fc87b5fe0061d8abcd0e42f6701e23ab2163ca93c1e883a42f7
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains keywords related to a 'craftsman staple gun manual', suggesting a lure to trick users into visiting these 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://seumenha.ru/wix?keyword=craftsman+staple+gun+68447+manual PDF link annotation
    • https://cdn.sqhk.co/zimajigon/bTugdia/gofagozuz.pdfIn PDF document text
    • https://cdn.sqhk.co/lebereme/jLePmig/homemade_ice_cream_recipes_with_carnation_milk.pdfIn PDF document text
    • http://hellesypakk.online/citytopia_mod_apk_obbrnak4.pdfIn PDF document text
    • https://cdn.sqhk.co/taxosavasesa/ifid8hc/83103991248.pdfIn PDF document text
    • http://tomogorman.com/fisco_agenda_2018_mexicoqn65e.pdfIn PDF document text
    • http://findssldz.xyz/barriers_to_innovation_in_the_workplace9hqbd.pdfIn PDF document text
    • http://detonic-shop.website/sinalumovutonegilr2fj.pdfIn PDF document text
    • http://demask.space/43812717714503ef.pdfIn PDF document text
    • https://cdn.sqhk.co/devepogisog/kOhhQhe/escape_the_walking_dead_3d_animation.pdfIn PDF document text
    • http://vas-rem.ru/triominos_de_luxe_regles_du_jeunaqio.pdfIn PDF document text
    • https://cdn.sqhk.co/zarudaletok/Kcjjhaq/balenciaga_triple_s_black_white_laces.pdfIn PDF document text
    • https://cdn.sqhk.co/nuxegaxujifo/uiaS2hc/fejelotamepakizokopibamu.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/bofake/xibogimu.pdfIn PDF document text
    • https://s3.amazonaws.com/sedowedi/84941573975.pdfIn PDF document text
    • https://s3.amazonaws.com/vinejivunitego/previous_employment_history_template.pdfIn PDF document text
    • http://pemukusa.epizy.com/jsn-_sr04t-_2._0_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/soxiduwuzefevode.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_off0000d52d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD52D 5640 bytes
SHA-256: 27acd80ba17c825b86e18fc865f5ddab9162f42e4d298a20e1ce8917d86950f8
font_01_sfnt_off0000e84d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84D 11040 bytes
SHA-256: fec68992291e86d943d5ee2f273ca8733fa82b60656cc74793a025b8e8e4892f

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