Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ff6a32e4f0b557d…

MALICIOUS

PDF

223.8 KB Created: 2021-04-05 05:20:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 2dd15d21c1edeb7c6e14a1068245f311 SHA-1: d659dcb5a48ae057788d10b7ac0f6bec45004ae9 SHA-256: 4ff6a32e4f0b557dcec7244d99e85432be5ba1f3e2b88158fa94a0e962f2c0a6
136 Risk Score

Malware Insights

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

The PDF contains heuristics indicating it is a phishing lure, using an image to redirect to an external SEO redirector. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were extracted, the embedded URLs and the nature of the PDF heuristics point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9918

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://maypoin.ru/wix?keyword=uniden+bearcat+bct15+scanner+manual PDF link annotation
    • http://santaparker.store/pufarimawijbtsxe.pdfIn PDF document text
    • http://sungo1.space/befujonamuz.pdfIn PDF document text
    • http://perfectiona.online/minecraft_unblocked_sweet_and_awesome_jarr02qz.pdfIn PDF document text
    • http://idealica-italy.site/bed_sheets_suppliers_in_pakistanyeosh.pdfIn PDF document text
    • http://prizinsta365.site/51398624082ddozk.pdfIn PDF document text
    • http://pl50off.info/228764107525bmnl.pdfIn PDF document text
    • https://lifulufo.weebly.com/uploads/1/3/1/3/131379971/nonupagidenuke.pdfIn PDF document text
    • https://cdn.sqhk.co/webuzifinuno/JjiieG3/99137354939.pdfIn PDF document text
    • https://cdn.sqhk.co/fukonovum/Djgiaib/home_switch_reviews.pdfIn PDF document text
    • http://br1.red/cardcaptor_sakura_wand_templated8svq.pdfIn PDF document text
    • https://cdn.sqhk.co/lilaxikixo/c9Hz7Bd/57843235957.pdfIn PDF document text
    • https://pekonupag.weebly.com/uploads/1/3/2/7/132741447/6379490.pdfIn PDF document text
    • http://afracheat6.xyz/xprofile_mod_apk_free_download5v2az.pdfIn PDF document text
    • http://physcoo.com/84443714395qf9kw.pdfIn PDF document text
    • http://helplnstagramoffice.com/tuxawolozijobolalixzkrv.pdfIn PDF document text
    • http://mp4.design/71399371580mi3cx.pdfIn PDF document text
    • http://physcoo.com/dejuboximokowiwiviridiw5g5j0.pdfIn PDF document text
    • http://inmyshtangen.xyz/maplestory_m_buccaneer_skill_guiderosd2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1b3e2d6a-0348-4772-9bb2-16e56a761455.filesusr.com/ugd/7bcf02_e88b91612b3448fa867955bdde6c063b.pdf?index=trueIn PDF document text
    • https://dacf5b84-f80e-4bd8-bb7f-22aad20a1cd8.filesusr.com/ugd/285be4_d4c9470683324e90bc1418a1f0966ecb.pdf?index=trueIn PDF document text
    • https://4cd5eafb-d261-4666-a528-29b55b1676c1.filesusr.com/ugd/8dde66_72f6c2f5a1dd466b92a0e1da37ca4a84.pdf?index=trueIn PDF document text
    • https://3176e400-c268-4dc0-8d69-08eae86937f8.filesusr.com/ugd/ea2f88_0634d17c41324571955888bf6595434a.pdf?index=trueIn PDF document text
    • https://425e2ee7-996f-4c6d-a593-b44a2a39b733.filesusr.com/ugd/bb05c1_48d6c3b0f9c74ad4b693c0cd068e902f.pdf?index=trueIn 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_off00033539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33539 5392 bytes
SHA-256: 2be3ad2a5a0461323819a2b3c163852315e49bb66926721ef3aad5445e8df03f
font_01_sfnt_off0003477f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3477F 11772 bytes
SHA-256: 5101a2ccfa35d4cc762e266b04bfa58ceca607389cf1a4e238799b6d1ef8fc3f

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