Malicious PDF — malware analysis report

Static analysis result for SHA-256 d22fe570246563cf…

MALICIOUS

PDF

79.1 KB Created: 2021-05-16 00:08:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c5c61ae3d5f7c8641ca961bc60a36e6f SHA-1: 46127e75c7c787fc374ed3340a33728ead9f809d SHA-256: d22fe570246563cf630dfd76053249c73cbd2779dbc95a0e5a69a5c44198701d
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. One notable URL is https://dugedepap.ru/strik?utm_term=resistance+training+band+exercises. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious intent, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dugedepap.ru/strik?utm_term=resistance+training+band+exercises PDF link annotation
    • https://zowajapizuxazo.weebly.com/uploads/1/3/0/9/130969341/6030457.pdfIn PDF document text
    • https://pememeva.weebly.com/uploads/1/3/0/8/130874233/mumin.pdfIn PDF document text
    • https://xilapadoz.weebly.com/uploads/1/3/4/5/134588650/7647115.pdfIn PDF document text
    • https://nupimixek.weebly.com/uploads/1/3/2/7/132712066/61ded81d.pdfIn PDF document text
    • http://ribupisid.22web.org/business_office_manager_job_description.pdfIn PDF document text
    • https://jegobegopij.weebly.com/uploads/1/3/1/8/131871729/f28b752337.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/bomifabipi/chess_apk_offline.pdfIn PDF document text
    • https://9afb1793-bc57-4514-bb46-74e980466609.filesusr.com/ugd/11f207_66271c0779bf4c77985ecadaf6b04a0d.pdf?index=trueIn PDF document text
    • https://0df22b04-17ae-4e65-9af8-3af4445b4601.filesusr.com/ugd/71fd01_352f3bbe635e4a34a258782a4573568b.pdf?index=trueIn PDF document text
    • https://e57d8632-f742-4524-ada6-9cdf759d9f13.filesusr.com/ugd/b0cb2d_4b21a24e467f49c88f137c4d88f829fc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3f4a217-4c11-499c-b731-37aaf2aaf26a/bushnell_neo_ghost_golf_gps_manual.pdfIn PDF document text
    • https://318abaa7-a496-4882-a5ef-186b1d719b20.filesusr.com/ugd/ff2e65_723a4ed2ed434c01bd8402cabb495b80.pdf?index=trueIn PDF document text
    • http://dadorisisewane.epizy.com/50989798986.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/types_of_electrical_wiring_devices.pdfIn PDF document text
    • https://3c8197b3-f999-4f29-b3da-fbdfea3dbf34.filesusr.com/ugd/0047a4_c30c7666b3664f9c8edc00dc706904f5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f14100e-1d72-4033-a542-7eb2a86831ce/42610513779.pdfIn PDF document text
    • https://3f740848-0e57-4b51-8596-564812021bec.filesusr.com/ugd/cbe17c_3fc1a2eff4934b1ea6fdb196114f8dd4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/polexebuj/the_heir_affair_book_summary.pdfIn PDF document text
    • https://6376acfe-5884-4251-b3d5-19a03c044549.filesusr.com/ugd/de3d83_40e95ec6cd444a389d5f290d599eb843.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/93d8cac5-e238-45f2-8153-1a5b628d085d/wejena.pdfIn PDF document text
    • https://71a5d838-4e22-4830-8da1-7955ec3365f5.filesusr.com/ugd/f2f43e_1799c73d6bfa4c2d896b9427f1a8dcbc.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2C 4968 bytes
SHA-256: 40278ef399522a5da704187fcf334705fa32b1b8e21c9b621663bb26ffcde920
font_01_sfnt_off0000fd16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD16 10448 bytes
SHA-256: 800bd41555aa7b65095f7b8c3f0e225bf959c886129a6eeed96d2822af4c7d15
font_02_sfnt_off000120f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120F5 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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