Malicious PDF — malware analysis report

Static analysis result for SHA-256 c760de1b2d0c8c74…

MALICIOUS

PDF

84.8 KB Created: 2021-03-22 22:18:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a609bdd767e6a0e20ebe1aaad78df2cb SHA-1: 1100a66887c4988366c8c41b852633e47dcfff51 SHA-256: c760de1b2d0c8c7415518ade47641e8202d467e3d1fd5d5557b429000260b967
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 0.9998

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://midufefew.ru/wix?keyword=uniden+um415+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379473/normal_603d22cb4979b.pdfIn PDF document text
    • http://magonawaneku.22web.org/44566758179.pdfIn PDF document text
    • http://kejoxemubogese.mywebcommunity.org/45222843479.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455208/normal_5fefdcc8633b5.pdfIn PDF document text
    • http://wirufebo.22web.org/bulekiviwozagew.pdfIn PDF document text
    • http://bogplaktnc.fun/1953673240184axj.pdfIn PDF document text
    • http://topsol.xyz/xubuwatewapotjwyyd.pdfIn PDF document text
    • http://lnstagramcopyrigtservice.com/biludodavisexenepefaxotipoymvz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486763/normal_601a3aae7fefa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499283/normal_5fe891ba8468e.pdfIn PDF document text
    • http://flash-sar.online/3750243685420448.pdfIn PDF document text
    • http://foxilajat.sportsontheweb.net/how_much_pulse_oximeter_is_normal.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://uploads.strikinglycdn.com/files/55cf22a3-c96e-4a0c-b073-67c5e7ab0067/tivulodebizako.pdfIn PDF document text
    • http://jurolabadujo.rf.gd/eastern_cooperative_oncology_group_ecog_performance_score.pdfIn PDF document text
    • http://vopapatadape.epizy.com/offline_action_games_free_for_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ef6f67f-1903-4288-98c8-fac484d53987/22552296016.pdfIn PDF document text
    • http://sogurorirerew.onlinewebshop.net/7832418556.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e250e13a-71fb-4f2a-9db5-e64d0dfd65ce/does_washington_have_travel_restrictions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c90f3c92-d3ee-4280-8020-a4f544aa1e80/dezazatisugak.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_off00010044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10044 4644 bytes
SHA-256: dd0a069cb0b79f76249e92f7532c8b14ea3d350fff2834b3e0f770acdbef9f04
font_01_sfnt_off00010ff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF3 11992 bytes
SHA-256: 60a45d3b5641808fb31d6206b213f0086be9cbc23b513836dd8b6bd501b11bb3
font_02_sfnt_off00013787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13787 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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