Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5289a2e5f9687fe…

MALICIOUS

PDF

77.8 KB Created: 2021-03-24 02:22:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c4540835c920dade06dcceaa8070864b SHA-1: c3be30ace7e9aad27faaeb67ae3cf9245e49f9ec SHA-256: f5289a2e5f9687fe41a0fd2a3861a35ed1e5bb9d8377704a9b641d497cedd699
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9991

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gimoguvi.ru/wix?keyword=crosswind+boot+camp+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4490129/normal_60474a4daadb0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393186/normal_601a730db40b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446394/normal_5fd7883902423.pdfIn PDF document text
    • https://nulixosur.weebly.com/uploads/1/3/4/3/134311840/8021772.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxiropuwomo/jeEhbih/earn_free_airtime_in_nigeria_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394066/normal_60162bcbdc0dc.pdfIn PDF document text
    • https://miwofovewunot.weebly.com/uploads/1/3/4/8/134873206/wolosujuxusapasoxuze.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420013/normal_60098a7a2fe01.pdfIn PDF document text
    • https://cdn.sqhk.co/fiduzosi/mTjdvRt/my_talking_tom_2_hacked_version.pdfIn PDF document text
    • https://cdn.sqhk.co/monasomeb/gdQjf4D/joker_whatsapp_status_video_download_sharechat_tamil.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/8Nbshhj/56749038576.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/19601064362.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/ff7_guide_shinra_building.pdfIn PDF document text
    • https://391e4f24-9fc9-4707-ac06-338edcd9f959.filesusr.com/ugd/110ef3_48c7826ac548474196a3dd3a69ec83f1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/damerirazib/buvotax.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/what_are_the_components_of_system_software.pdfIn PDF document text
    • https://f87ce62f-3d5d-4c42-bff3-2e7d00444551.filesusr.com/ugd/72ed28_dbacd031ee834a2bbfea4aec3678c251.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/nesinisaganuzuxomusekef.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/44044189623.pdfIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/wogipozamikidisu.pdfIn PDF document text
    • https://51f47fa2-20f7-4ec4-bb91-8ae4aee689b4.filesusr.com/ugd/917232_33b58cf4c9964b28ae94bce0a80a7e85.pdf?index=trueIn PDF document text
    • https://ce2645ba-e89a-43d5-afff-5c0150757291.filesusr.com/ugd/c63dba_cfcddab1115b428e88eb7fd588338e9d.pdf?index=trueIn PDF document text
    • https://de99c131-68bf-4271-bcef-cda292486844.filesusr.com/ugd/f5892c_60c2e27312bb402db96ef9aa3bdf0073.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nitatotol/chamberlain_myq_home_bridge_manual.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_off0000efd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD1 5356 bytes
SHA-256: bd576a25e33bad5ff17a0796b83ee93ea90241f5f4e184ce6aaa3fad00dc2c09
font_01_sfnt_off000101f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F4 11920 bytes
SHA-256: f6870c824da5dd4e2e2cefd383d5b8d63207398f5da51a3091ba209ec285eca9

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