Malicious PDF — malware analysis report

Static analysis result for SHA-256 c04e8e6d20c4d2cf…

MALICIOUS

PDF

77.6 KB Created: 2021-03-31 18:43:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1d89f7f7c9eff42454a44953fd2c49aa SHA-1: a952cdf0c192917f8a91f824b45edc3b4bdd2ac4 SHA-256: c04e8e6d20c4d2cf1f0df7b4d8dcf22e0614829ce8d09cb9cb32c68eb8775f6e
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 0.9997

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://xezojetit.ru/wix?keyword=chapter+9+special+senses+worksheet+answers PDF link annotation
    • http://xojuxegalixiluj.66ghz.com/rifapajukob.pdfIn PDF document text
    • http://rubisteq.online/95929688017opa4d.pdfIn PDF document text
    • http://mebelintera.ru/duzitovetfouh8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d54d55f4-8004-4613-9f19-7b96cbed0ae7.filesusr.com/ugd/ce4b32_94affa07466642848b03b424f631d264.pdf?index=trueIn PDF document text
    • http://povosiz.epizy.com/kozepopibimosugi.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/avast_secureline_vpn_license_file_2021_android.pdfIn PDF document text
    • http://pisisagul.epizy.com/what_color_does_not_absorb_heat.pdfIn PDF document text
    • https://67bb8873-ca08-4da4-87c0-60a8072ebff6.filesusr.com/ugd/a838c0_b96a0a9e621b4d9da3cd89afd67f013d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8af3468b-0714-4946-8993-01d9aa726eac/75782748502.pdfIn PDF document text
    • http://tijilidimipep.epizy.com/baba_balak_nath_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/free_graphic_design_books_for_beginners.pdfIn PDF document text
    • http://sarovagovoz.rf.gd/gedowuvubajazifaseku.pdfIn PDF document text
    • https://3e3188f7-d9e9-48da-9af6-4e6760718ee0.filesusr.com/ugd/4f7562_bf1af4642f3846d0ab94bc90a7bb26e5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/13923294105.pdfIn PDF document text
    • http://poberebom.epizy.com/audi_a3_sportback_2020_owners_manual.pdfIn PDF document text
    • http://fojamemu.epizy.com/joomla_templates_helix_framework.pdfIn PDF document text
    • http://fufapawaxuta.rf.gd/98882242260.pdfIn PDF document text
    • http://pojakopov.epizy.com/91871581319.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac41d5f3-4451-4b4c-a67f-c1a6234612f1/83400164595.pdfIn PDF document text
    • http://garijezisu.epizy.com/par_quoi_remplacer_du_beurre_dans_un_gteau.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_off0000f448.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF448 5236 bytes
SHA-256: fdd8c2d6ecffab1f4598dd0f291654f79c8767a99302327f344514e77eb1688e
font_01_sfnt_off00010624.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10624 10324 bytes
SHA-256: 21164672aca183abfd723ae967b01cc274297f88aa75015eb63e471e963351a5

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