Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebeefae1814bccac…

MALICIOUS

PDF

71.1 KB Created: 2021-02-21 06:47:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 584c43cda3a0ac1cdde1c9ceb70582e6 SHA-1: 0ce5f183f1c077a7c41117449aae839bc2e9eabb SHA-256: ebeefae1814bccac92b9236312c4152ef125961da6c5fc49449349394416b276
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, identified as a link farm. Several heuristics indicate this is a malicious SEO tactic, with one URL pointing to a potentially malicious domain. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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/wix?keyword=boxhead+zombie+hacked+unblocked PDF link annotation
    • https://cdn.sqhk.co/duzemata/hg7fzia/59717104750.pdfIn PDF document text
    • https://cdn.sqhk.co/werutojij/dt3ihgh/allegiant_stadium_inside_pictures.pdfIn PDF document text
    • https://lonexuganaj.weebly.com/uploads/1/3/1/8/131856054/zagaroluxope.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463306/normal_5fd894b233cc7.pdfIn PDF document text
    • https://cdn.sqhk.co/kulukopupiw/cigUgji/rudulofosupufur.pdfIn PDF document text
    • http://soluzixod.66ghz.com/foribof.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404310/normal_5fe2f16023b1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412905/normal_6021c9e293850.pdfIn PDF document text
    • https://generixa.weebly.com/uploads/1/3/5/3/135350481/vezikajelubididafax.pdfIn PDF document text
    • https://cdn.sqhk.co/xaxovowupofa/0ERribI/d-_day_us_history_definition_quizlet.pdfIn PDF document text
    • https://cdn.sqhk.co/zolilobup/Vihib41/battlevoid_first_contact_codes.pdfIn PDF document text
    • https://xekariwunaju.weebly.com/uploads/1/3/1/0/131070431/3780596.pdfIn PDF document text
    • https://muwujexowosis.weebly.com/uploads/1/3/1/4/131437891/notivakegetalofaw.pdfIn PDF document text
    • https://cdn.sqhk.co/xejulonejo/VKghFwg/secure_settings_plugin_for_tasker.pdfIn PDF document text
    • https://cdn.sqhk.co/wetilusogaki/ibJhf9H/neon_green_snake_print_sandals.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://s3.amazonaws.com/saxefi/interest_coverage_ratio.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/78550584584.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/chain_rule_aptitude.pdfIn PDF document text
    • http://xuxidiso.epizy.com/pc_power_supply_paper_clip_test.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_off0000cc07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC07 5080 bytes
SHA-256: bfa363d94276f6d41bc452b1008f21b4bd56689edd5366b51be162921ef678c7
font_01_sfnt_off0000dd2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD2D 10600 bytes
SHA-256: e623c10ed162a7ecc54269690dd7d3a8cf2391151163e0721c8a0fd1d100dd4e
font_02_sfnt_off00010134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10134 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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