Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d09f844c46f698c…

MALICIOUS

PDF

80.2 KB Created: 2021-04-02 19:45:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b9c2ca39ece6cd6418c2aec5b0f77e17 SHA-1: 2ea966ac35f3aba3edfce0987c6c87c1156ac991 SHA-256: 8d09f844c46f698ccacdcddbdfb74437ac2556aca03e641164e6e6a465d4c98e
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a ML classifier and ClamAV. It contains a large number of external links, many of which point to a link farm hosted on weebly.com, suggesting SEO manipulation or a phishing campaign. The embedded URL 'https://dafemum.ru/wix?keyword=tintes+de+cabello+de+moda+rayitos' further supports the idea of a lure to a potentially malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dafemum.ru/wix?keyword=tintes+de+cabello+de+moda+rayitos
    • https://kexexetipo.weebly.com/uploads/1/3/4/8/134897314/kofuzofesazigobu.pdf
    • https://forilulan.weebly.com/uploads/1/3/1/4/131408022/8889147.pdf
    • http://vorogaxafu.iblogger.org/71736545927.pdf
    • https://cdn-cms.f-static.net/uploads/4385412/normal_605cb176e6068.pdf
    • https://static.s123-cdn-static.com/uploads/4476952/normal_60080bb393762.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/a8b09171-d25a-42de-92c2-45944e260add/jeep_wrangler_lift_service_near_me.pdf
    • https://uploads.strikinglycdn.com/files/f25b9363-5cfb-4f8a-a0c1-aa3571bd8af2/rules_for_knights.pdf
    • https://uploads.strikinglycdn.com/files/09efcc27-86da-4072-83e0-ed3556479bda/22891251194.pdf
    • https://uploads.strikinglycdn.com/files/e8ac67da-8d57-40fa-bd5d-0e9932c83918/what_intermolecular_forces_are_present_in_70_30_water_dioxane.pdf
    • https://17851959-1482-4b49-8222-7b7b0c628459.filesusr.com/ugd/3cb679_6db9805ae1914d2db629bf706dff03b2.pdf?index=true
    • https://7f1888b6-cdab-4603-9914-1cf81a8b29aa.filesusr.com/ugd/6846fe_09ff2a3d3db741da8a91e9a802d0ab3c.pdf?index=true
    • https://b00f38ea-0d13-4519-ab0f-1253f0d03ca0.filesusr.com/ugd/289c5e_0751cf6ac1c840debc75d08ba5cc5fea.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3b68012d-9c40-4ae6-b84c-c6788ca86dd3/lazeferagetiladofew.pdf
    • https://be08d7d4-326a-4801-be9d-4496af17a43b.filesusr.com/ugd/d31907_9062d5d78f9e4ef3a62ac45010e4382a.pdf?index=true
    • http://gumusijejokezit.epizy.com/construction_company_logo_design_free.pdf
    • https://uploads.strikinglycdn.com/files/2d57403e-935f-4e80-9b44-431d768a71bc/87213841104.pdf
    • https://c81c1a69-aec6-471c-ac34-7a6800eafc69.filesusr.com/ugd/9ef1ea_38efb054065d4e76bf15017571ab14ef.pdf?index=true
    • https://uploads.strikinglycdn.com/files/29347dab-c4a2-4eeb-af3f-c08e3d9706b6/whirlpool_appliance_service_near_me.pdf
    • https://uploads.strikinglycdn.com/files/bcf01e63-19ca-4517-8dbd-162704c94289/rijus.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebcf.bin
1f2c4476c28716ab16662b24149a3ffe4912705eb4cf2c2d004ea51f39ed3ef2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCF 5064 bytes
font_01_sfnt_off0000fcde.bin
25e4bc98fa89d67531fab5b18853f2fdca777038634e281142176db689d16f83		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCDE 12092 bytes
font_02_sfnt_off000123c8.bin
05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176		 pdf-font-stream PDF embedded font (sfnt) at offset 0x123C8 4324 bytes

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