Malicious PDF — malware analysis report

Static analysis result for SHA-256 929530abbf763f12…

MALICIOUS

PDF

89.4 KB Created: 2021-03-28 09:19:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ac1409e4f63fabd98f8594c7ae0927b SHA-1: 50fbdfa82d75caef5cc9bc71b00b969a3d1424d7 SHA-256: 929530abbf763f12d74f45247ba4474e664c74542288f29235fb81c8bec9df84
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to potentially malicious domains, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URLs are likely used to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=accursed+hex+pathfinder
    • http://moratelusubuzol.22web.org/letter_d_worksheet_preschool.pdf
    • https://zukusabaxiwig.weebly.com/uploads/1/3/4/0/134000387/bowirepub.pdf
    • https://tojumemi.weebly.com/uploads/1/3/1/3/131379390/lilapigogo.pdf
    • http://zekuweteni.22web.org/kobalt_7-in_10-amp_wet_sliding_table_tile_saw_with_stand.pdf
    • https://cdn.sqhk.co/tolademapati/pFKjdia/moposememanedadejos.pdf
    • https://cdn.sqhk.co/zizenozi/dig1geG/12168467326.pdf
    • https://gawujura.weebly.com/uploads/1/3/5/3/135325150/kevew-gegerixu-kawixix-xabekerepofijes.pdf
    • https://vekerarefatada.weebly.com/uploads/1/3/4/8/134868636/4633434.pdf
    • http://zakukamupavi.22web.org/human_body_systems_quiz_with_answers.pdf
    • https://xisedemagi.weebly.com/uploads/1/3/2/6/132681548/ximorakibefa-fadaxev-vinenonuginutuf-dowaja.pdf
    • https://cdn.sqhk.co/rufopunuk/iae9Sjd/mind_games_store_shelby_township.pdf
    • https://cdn.sqhk.co/tovipovo/Ogh1Ehc/tixuvepebixafebaba.pdf
    • https://zuzatalo.weebly.com/uploads/1/3/4/3/134326893/2548455.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://2061f665-9309-41a6-981d-137229ee7e60.filesusr.com/ugd/eb2fe6_a404b7a96a344fb691fdd591b6fb4aac.pdf?index=true
    • https://uploads.strikinglycdn.com/files/e202018d-fcb6-4aa8-a3fa-7076df4f9a96/mimajakexitizilajejo.pdf
    • https://uploads.strikinglycdn.com/files/439ab588-b576-46bd-be46-8f9b229a768c/gukogobuk.pdf
    • https://1a9cd40a-f0d6-44d4-a143-19288280ca2b.filesusr.com/ugd/7a13df_9cd7bf005eb448369ca1c3ab94f4879d.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4c28aaa4-9810-4e3a-b6e1-19da1b4d1fab/67227094191.pdf
    • http://bisiziwaros.epizy.com/rogubeguniwobil.pdf
    • http://majuditatip.rf.gd/34788828570.pdf
    • https://uploads.strikinglycdn.com/files/dfeee24c-ca36-43bc-84de-913e7b90dd25/zewivoguferixenijetebegef.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012062.bin
981fb6886c62aef71e5d39c7b1ed3ba4d2c8e0f4089e9bd58d4ab7f403c4d12b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12062 5268 bytes
font_01_sfnt_off0001324e.bin
b5206d46df85c803e2681a0c82cd413f700085e23a8d571ca6ad73fd317d2f65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1324E 11372 bytes

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