Malicious PDF — malware analysis report

Static analysis result for SHA-256 49496408a3c098b3…

MALICIOUS

PDF

73.0 KB Created: 2021-05-08 19:05:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e3867508e45912b91928277122e43447 SHA-1: 51d35dee369f6947eb22a63dbec6277d251ba6c0 SHA-256: 49496408a3c098b32e2a34ae84c23ff9a2647a0762e6e1aa2a88f2de422f4c9d
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://bologen.ru/strik?utm_term=pokemon+heartgold+and+soulsilver+official+strategy+guide+pdf+download PDF link annotation
    • https://wexisuteki.weebly.com/uploads/1/3/4/6/134616275/gesedamedoj-nidokixifaweza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464327/normal_5ff9ad6673cb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410962/normal_603226d37b8bb.pdfIn PDF document text
    • http://xeniveperovabef.sportsontheweb.net/professional_catalogue_design.pdfIn PDF document text
    • https://nagalijas.weebly.com/uploads/1/3/1/3/131398542/cdd5e41475c1.pdfIn PDF document text
    • https://bevazemirif.weebly.com/uploads/1/3/4/8/134873662/nogovusulaf.pdfIn PDF document text
    • http://vazawujuzu.sportsontheweb.net/98219907142.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455914/normal_6029f1855e066.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382627/normal_6022b07b4f276.pdfIn PDF document text
    • https://xikuvisaduwobax.weebly.com/uploads/1/3/5/9/135962120/1bbe3be0.pdfIn PDF document text
    • http://dumubemajizukov.medianewsonline.com/13053144221.pdfIn PDF document text
    • http://suzofovolavuk.scienceontheweb.net/25728708583.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413346/normal_5febefd24fd2d.pdfIn PDF document text
    • http://sijubuwejipamun.mywebcommunity.org/pinigaxazejatafob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://satovimowenijor.myartsonline.com/bahutu_manifesto_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67456242-d753-46fe-99aa-7507d1c0d7a0/ray_dalio_big_debt_crises_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d84b6af-ddef-4d9d-9da1-1661b86d7283/10139572000.pdfIn PDF document text
    • http://zogadawedalifap.onlinewebshop.net/alleluja_mio_twa_nuty.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc3d37e4-1073-4f2c-85e9-666d5323217c/votewilubevenanonevigom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f7315d4-dca9-427a-b5f3-b85a6852cead/lupafozedafami.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df056ee5-ec51-4a14-b2fa-6cfb7dac3d83/is_my_cdl_valid_without_a_medical_card.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b101439-9345-45d4-b59d-be67e588e585/how_to_make_a_frequency_table_in_statcrunch.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_off0000de9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9E 5888 bytes
SHA-256: dcf288aaa7d216122e8f988a1fcf9445ee08a946bacc10e52f15522949c1fcee
font_01_sfnt_off0000f2a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A6 10496 bytes
SHA-256: 5e7ca8d3fe354653afc93874a56fa89cf1e31e0e3ae34a9f77718532eedd3151

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