Malicious PDF — malware analysis report

Static analysis result for SHA-256 10d2cc3faaa354dc…

MALICIOUS

PDF

76.1 KB Created: 2021-04-23 08:17:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 5474546a2260fb4b989b2c68d30395b2 SHA-1: c9457e0d6407c6a8ce6a64e9c2415c74705327d7 SHA-256: 10d2cc3faaa354dc99f8825a09104c5efe0296bcc48c401d7b3b6403f7d1bfcf
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a large number of outbound links designed to manipulate search results or direct users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • 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.
  • 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://kuzutuzo.ru/strik?utm_term=unite+d%2527habitation+marseille+plan PDF link annotation
    • https://fibunijir.weebly.com/uploads/1/3/0/7/130740490/ff22935e.pdfIn PDF document text
    • https://nemabofafuz.weebly.com/uploads/1/3/5/3/135389169/napoz.pdfIn PDF document text
    • https://mitigifagoted.weebly.com/uploads/1/3/5/3/135325532/kulona.pdfIn PDF document text
    • http://hookup154.online/what_kind_of_oil_does_a_2008_rav4_takezfi0f.pdfIn PDF document text
    • https://kezagoguz.weebly.com/uploads/1/3/4/1/134131769/penujepozudawi-rogozoz.pdfIn PDF document text
    • https://nozodipipagim.weebly.com/uploads/1/3/1/4/131438171/4399860.pdfIn PDF document text
    • https://wapugumimujera.weebly.com/uploads/1/3/4/7/134749028/mexopigumed_puwarusubiwuxoz_fidesujazuwag.pdfIn PDF document text
    • https://zusajozaza.weebly.com/uploads/1/3/1/3/131381142/fda999063.pdfIn PDF document text
    • https://fafafupoxojamu.weebly.com/uploads/1/3/5/3/135350358/9765720.pdfIn PDF document text
    • http://trycabinets.xyz/708298657513201a.pdfIn PDF document text
    • https://xunuvetokogira.weebly.com/uploads/1/3/1/3/131384336/vesiwa_vomamebad_libefenujoro.pdfIn PDF document text
    • https://bexaxaxaf.weebly.com/uploads/1/3/2/6/132682125/forilisuzukovib-bogudu-wafozopoxiz-nedelele.pdfIn PDF document text
    • http://mazafaka69pussy.online/anorganick_chemie_housecroft7qwl1.pdfIn PDF document text
    • https://kifesajisibak.weebly.com/uploads/1/3/4/8/134884742/5721990.pdfIn PDF document text
    • https://wimavebitajiki.weebly.com/uploads/1/3/4/6/134609796/114412.pdfIn PDF document text
    • https://kofuremejekesor.weebly.com/uploads/1/3/4/2/134235353/97259ea51c4e8e5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc4fe66b-de06-448b-b6c8-e2cb495f2a75/metifivufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15cfb8df-a6b8-4e89-950a-d05b8412d6d6/etq_tg_7000_generator_manual.pdfIn PDF document text
    • https://29ce6865-365c-47c4-9f0a-635d6f965865.filesusr.com/ugd/0d6b77_174321f3b8d84510bc27df5c3ad8a506.pdf?index=trueIn PDF document text
    • https://2903667b-e544-4972-ac7f-e5855aaa9b37.filesusr.com/ugd/2cc660_8bc38a08e6664203a5c16c6458c63f12.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e38e5f7a-d9ed-46c8-93ad-a08150f835e3/cub_cadet_mower_parts_near_me.pdfIn PDF document text
    • https://45f61934-b4a1-4335-a9e3-e142d9465b5b.filesusr.com/ugd/0dd040_305728b3aef44fe88f01c2b759e0f0f8.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f97f2b87-451f-4033-b8f2-3efa336c9c3a/78619619090.pdfIn PDF document text
    • https://a815f367-2516-4b88-9496-eed07d5c1eb7.filesusr.com/ugd/665c20_a0ebb29de77b493aa33f2bb950904ba5.pdf?index=trueIn PDF document text
    • https://cd29ef07-728f-4a0b-b57b-23e770395c36.filesusr.com/ugd/f14cf6_9cfb7f28338c4e849700e323ecf6fcbb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/83c3c2bd-1db2-42f2-9cf6-729bbf929c13/83563421928.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_off0000e9fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FC 5364 bytes
SHA-256: 240abf51b276b18f34bf1fecac84a910b867f2db0f765625aa9db7e7a553b1f8
font_01_sfnt_off0000fc0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0B 11092 bytes
SHA-256: 1abd03747f0b6bbfc2a279fc2242d076cc934b1592231a7d493ae3ef242b8007

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