Malicious PDF — malware analysis report

Static analysis result for SHA-256 52651c8254cb9ae5…

MALICIOUS

PDF

95.3 KB Created: 2021-03-29 14:00:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2680545cdc1e9fa98bfdb8ffcb4fc15d SHA-1: c2b34030096a1eeb15d2d541acc5a7caacb8847b SHA-256: 52651c8254cb9ae559f14376649da82c5dcf9c453fd4bf7f3af62f6e76944d31
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and numerous external URIs point towards a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://seumenha.ru/wix?keyword=twilight+temple+boss+3+guide PDF link annotation
    • https://cdn.sqhk.co/tivuzofep/jihhthb/81698536277.pdfIn PDF document text
    • https://gufonalika.weebly.com/uploads/1/3/4/0/134096228/mosap-vusarojilige-ketisob-xofonikapedama.pdfIn PDF document text
    • http://xenejesujotolud.mypressonline.com/bimumuvotodujidir.pdfIn PDF document text
    • http://vataponuxizeliz.mywebcommunity.org/adobe_pro_for_mac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419218/normal_5fd0f8663fad6.pdfIn PDF document text
    • https://sekikeke.weebly.com/uploads/1/3/4/7/134739811/karaxuporuduso.pdfIn PDF document text
    • https://femodamokej.weebly.com/uploads/1/3/4/5/134529999/7700288.pdfIn PDF document text
    • https://vijopafixav.weebly.com/uploads/1/3/1/6/131636601/rumofene_zafepojon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492600/normal_602c5b3506e3a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366400/normal_5fdfd45d481e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367625/normal_601a3982648d9.pdfIn PDF document text
    • https://cdn.sqhk.co/lejesapazud/Ujdryjj/santorini_greece_hotels_with_private_infinity_pool.pdfIn PDF document text
    • https://gimuloge.weebly.com/uploads/1/3/0/7/130775506/sulagejegebuduf_mitevadefifobi_lofalige_luxowiwaletud.pdfIn PDF document text
    • https://cdn.sqhk.co/kepilujofeje/diddMgi/uber_driver_car_requirements_georgia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486778/normal_5fd19ca393694.pdfIn PDF document text
    • https://cdn.sqhk.co/livefivepa/xggDheR/deloitte_asc_842_lease_guide.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/b5c0d2c7-017c-4070-b4f5-da6e6dc04b7e/2797128779.pdfIn PDF document text
    • https://af18ad75-7652-4b25-b9e0-8da5fded0af1.filesusr.com/ugd/529385_dc020de8eba049709ef7d8c1c13e2d41.pdf?index=trueIn PDF document text
    • https://dd39d194-9042-494f-90ab-223c96cf8da5.filesusr.com/ugd/5d3909_54ece55dcf254786a265cd3c26b6b3d7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3e5b924-e99d-4011-ab65-d35ed046c608/how_to_learn_writing_skills_sims_3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74f3171a-566e-4a45-9de1-f0456b9705e9/suxife.pdfIn PDF document text
    • https://ce2645ba-e89a-43d5-afff-5c0150757291.filesusr.com/ugd/c63dba_3fbbd206c629470c98a6bd6e6c85cad1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/683a81bb-ec0e-4c1c-b227-8965006d70d3/nuzobo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A0E 5328 bytes
SHA-256: 1b55af692a528d0a19a8830fb0fa9710ce9bc5a44dbe0b184c47133895732e00
font_01_sfnt_off00011c69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C69 5412 bytes
SHA-256: e19c8b7f1c5fd272718c7c2204c9beddd2c1626983c4b334d78a1ef2d2b734c9
font_02_sfnt_off00012ebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EBC 11312 bytes
SHA-256: 7c78c16c823a95bdd20638963890739274a365e6a6cb2a9c8d5ab2551580480a
font_03_sfnt_off00015589.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15589 18544 bytes
SHA-256: 58edd58994710c8e657574c3373913b5a6fd641c8aaf4470798efe28e144165c

Open this report in the interactive analyzer, or submit your own file for analysis.