Malicious PDF — malware analysis report

Static analysis result for SHA-256 496d7e31e20ad539…

MALICIOUS

PDF

106.9 KB Created: 2021-03-08 06:40:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3f6b8681874643503e74d07c4787dd66 SHA-1: 7d0bd134f779010853a8c90233aee0cbcc6852c5 SHA-256: 496d7e31e20ad539474b3ad205cd47873edb662f25a7c75ea997f967395cfd1c
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 0.9996

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://seumenha.ru/123?utm_term=will+it+be+a+new+twilight+movie PDF link annotation
    • https://cdn.sqhk.co/simizekovogi/ftXWjaL/49154979396.pdfIn PDF document text
    • https://cdn.sqhk.co/bovokolel/heXNjj9/4373342374.pdfIn PDF document text
    • https://cdn.sqhk.co/xadakede/jitYsAj/123_go_challenge_new.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383923/normal_6001bedeaa881.pdfIn PDF document text
    • http://fikepoj.22web.org/biodata_philippines.pdfIn PDF document text
    • https://cdn.sqhk.co/bonosexov/aRdia3d/34324305629.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379043/normal_600a0d188b871.pdfIn PDF document text
    • http://mebets.xyz/10758385103fmrj5.pdfIn PDF document text
    • https://cdn.sqhk.co/vegubefeno/ieojiW6/52106654370.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425917/normal_6007936d0ef75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447089/normal_603862753d146.pdfIn PDF document text
    • http://rasprodavaika.ru/velocity_vs_time_graph_negative_acceleration1blmm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://e0fa0743-814d-41de-b6a5-47f787911882.filesusr.com/ugd/89d2ef_d963681d1f5b428a887daae2e2dfa86d.pdf?index=trueIn PDF document text
    • http://mekuletolazov.rf.gd/buluzigitasapudu.pdfIn PDF document text
    • https://1bf92926-22d0-44a1-94fb-b51843c41cd5.filesusr.com/ugd/762c1a_abff0b4ef1cb4eceb413e1fb33f7a20a.pdf?index=trueIn PDF document text
    • http://gurevetafajes.epizy.com/cg_movie_website_list.pdfIn PDF document text
    • https://e437b920-fa79-41d5-b67c-0ca059f4e77a.filesusr.com/ugd/d97c10_93e12135e8404253a80b4ce9f6bb1345.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/69a15f74-a578-4aa9-b34d-04e4da11f700/why_are_my_beats_connected_but_no_sound.pdfIn PDF document text
    • http://wagivudixar.epizy.com/buzazobenukavan.pdfIn PDF document text
    • https://75e6d08a-b14f-4c2c-bd4e-3e6431d9d11c.filesusr.com/ugd/497a87_273c87c8cdba4d109d9217de22bfd91a.pdf?index=trueIn PDF document text
    • https://fa202315-5cd5-4006-9a99-7c5d4406650e.filesusr.com/ugd/61804c_b226b3cb3a6740728454df90aafd2d6d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca6d9e09-ad2e-4747-9f6e-042f616be09f/tubalopujixus.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000158dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158DD 4920 bytes
SHA-256: 4b055ada2422dfe5acda03ec8f11cce7c4a4f3f7bfaa87a0f16797be785b4f4b
font_01_sfnt_off0001697d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1697D 11696 bytes
SHA-256: a1dc61a8ce94980862de2390ec9dc5a9546f88c1b6c65d812abe061b7ddf8a7f
font_02_sfnt_off00019054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19054 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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