Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c91fe27886c43cf…

MALICIOUS

PDF

75.3 KB Created: 2021-03-18 12:53:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: d97c496e23bdb64bbe7cc05989e6aa52 SHA-1: 2596aa2c97fa434436a3558e17a996806880122b SHA-256: 2c91fe27886c43cfc6cc26ab9cc42cdf3b7c8362c7c2d75c41adf9cab97d48a8
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The primary malicious URL identified is https://xezojetit.ru/strik, which is likely used to redirect users to further malicious content or download malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xezojetit.ru/strik?utm_term=manual+de+operacion+aduanera+apta PDF link annotation
    • https://cdn.sqhk.co/kopilixa/imDuEor/motorbike_garage_mechanic_simulator_apk.pdfIn PDF document text
    • https://wufujaxuwagax.weebly.com/uploads/1/3/4/4/134400484/cbafb2ae.pdfIn PDF document text
    • https://cdn.sqhk.co/rotuzuwibi/8idvRgi/upfitter_switches_2013_f150.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/aDhdvJp/head_boxing_d_d_dream_mod_apk.pdfIn PDF document text
    • https://tererenigi.weebly.com/uploads/1/3/1/4/131405956/gonafesonetomub.pdfIn PDF document text
    • https://rinilevewabidu.weebly.com/uploads/1/3/1/3/131382630/5834812.pdfIn PDF document text
    • https://pidolanapeg.weebly.com/uploads/1/3/0/8/130813957/9772953.pdfIn PDF document text
    • https://cdn.sqhk.co/lowanivari/jgAhidA/munedifimases.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423133/normal_5fd16f4ad9d08.pdfIn PDF document text
    • https://lepopitiw.weebly.com/uploads/1/3/4/7/134762721/1965273.pdfIn PDF document text
    • https://bejidadona.weebly.com/uploads/1/3/0/9/130969139/vokijo.pdfIn PDF document text
    • https://tobuveforo.weebly.com/uploads/1/3/0/9/130969072/melopevobafulap-wuwapi-sopetimo-gifulewimujiwew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380682/normal_6024359551088.pdfIn PDF document text
    • https://lejalebenepuk.weebly.com/uploads/1/3/0/7/130776022/soxuragulorixipup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fa53e508-d88d-41cb-897c-7a5b6f1bfcc3.filesusr.com/ugd/361045_52d141a4aef842148f224de528a515cb.pdf?index=trueIn PDF document text
    • https://d670dda7-df53-4ef1-8eda-d3256df28744.filesusr.com/ugd/dbbbec_82f650200e8e4833a61465b675d7608b.pdf?index=trueIn PDF document text
    • https://67bb8873-ca08-4da4-87c0-60a8072ebff6.filesusr.com/ugd/a838c0_afedd1c1ab464391af18c6389751539f.pdf?index=trueIn PDF document text
    • https://4be8a7ba-6c9a-47a4-99fc-a5961b41a404.filesusr.com/ugd/132250_619144f294b14b9e9db286596801f284.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/04034d02-c3b9-49cc-a503-b0c6696ec7d6/stairway_to_heaven_korean_song_mp3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c7d1638-c4b7-40e8-8212-2017ffb4a2b8/noco_genius_10_repair_mode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2712e61-f056-4933-a762-102e05fbdaf4/gipozuri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b033bc64-77f2-4f06-b9b9-b5963930c99f/honda_gc_160.pdfIn PDF document text
    • https://91ca87c2-c493-4616-adaa-fbcec45394e1.filesusr.com/ugd/6116da_2761292b65224e2b9253d8313217caed.pdf?index=trueIn 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_off0000e8d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D2 4896 bytes
SHA-256: e1c65ccf80a938363c2d2487715101fa99e6eb026e92d9e114d93242ea735127
font_01_sfnt_off0000f996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF996 11248 bytes
SHA-256: 6cc2689e0e83467ede443a5c34a7d9c921585880c6b6a18fe91af9285e18df02

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