Malicious PDF — malware analysis report

Static analysis result for SHA-256 9df42ca315806c0d…

MALICIOUS

PDF

77.0 KB Created: 2021-06-08 12:39:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 2d97a4199c59ee8187f0a9467c4bb5b8 SHA-1: d2422ac6fef5a32dffa0386867cd64092732f3d8 SHA-256: 9df42ca315806c0d7d33a6c7b3c1bcd78f151fed527b9ca9d2b66c92702cd224
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users. The document body, though heavily obfuscated, appears to be a lure related to updating Android devices, which is a common tactic for phishing or malware distribution. No scripts were extracted, but the extensive link farm and malicious classification indicate a high likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://garglob.ru/pbw?utm_term=how+to+update+android+version+on+mxq+box PDF link annotation
    • https://tobisimotar.weebly.com/uploads/1/3/5/3/135330661/pikav_gojelalitekukal_pazevulovub.pdfIn PDF document text
    • https://ruxibini.weebly.com/uploads/1/3/2/6/132680870/rekumoxe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444657/normal_5fe23fffb6241.pdfIn PDF document text
    • https://zufulakoloti.weebly.com/uploads/1/3/5/3/135301661/4421880.pdfIn PDF document text
    • https://xedatuvigino.weebly.com/uploads/1/3/4/5/134580066/7a6ba26648db2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415537/normal_5fef9b6cd6827.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462352/normal_5fc95dcd26ccd.pdfIn PDF document text
    • https://bemafaparad.weebly.com/uploads/1/3/2/6/132681832/kisuzubeloroze.pdfIn PDF document text
    • https://gigerexug.weebly.com/uploads/1/3/5/3/135341911/vosixofufuwetat-xirokawexebajap-xewulipe.pdfIn PDF document text
    • https://mokawipo.weebly.com/uploads/1/3/4/2/134234768/sifolamivadafudunu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490918/normal_6064774b29f57.pdfIn PDF document text
    • https://tawatoxox.weebly.com/uploads/1/3/4/0/134018263/698406.pdfIn PDF document text
    • https://witudaki.weebly.com/uploads/1/3/4/3/134332653/ganaditixa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fozujedax.pbworks.com/f/15388433801.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6dd92fd-d152-4f59-98ec-d8606c6f23a4/repikimemuxetenotunon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cf44b4c-de1e-4de0-9168-7d49e8378268/89196549637.pdfIn PDF document text
    • http://rimikupababo.pbworks.com/f/adverb_worksheet_for_class_2_with_answer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/555d2ecf-9b48-4ae6-8406-22f030f7ba2a/2541498237.pdfIn PDF document text
    • http://damopijos.pbworks.com/f/garesodadibegenitaretolar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e57bb7ae-a505-4009-817c-02fe601b70fe/research_methods_for_criminal_justice_and_criminology_8th_edition_ebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31944189-8a6e-4828-8c82-5aa620c91d49/the_organic_chemistry_tutor_jg_face.pdfIn PDF document text
    • http://jadubunid.pbworks.com/f/fivadopibowabufuwofofopor.pdfIn PDF document text
    • http://dajodovilav.pbworks.com/f/29250482873.pdfIn PDF document text
    • http://kevuxezedila.pbworks.com/w/file/fetch/144605379/jopiwaxujatularokuv.pdfIn PDF document text
    • http://tufukamapaf.pbworks.com/f/plate_girder_bridge_design_example.pdfIn PDF document text
    • http://zopujoxobug.pbworks.com/w/file/fetch/144748206/total_fitness_nhs_discount_code.pdfIn PDF document text
    • http://vugufosenene.pbworks.com/w/file/fetch/144445827/47134110015.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_off0000ed24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED24 5520 bytes
SHA-256: 2057f377e539e59be11a42a6ddf032e4f14fda869647a15bf6e84a1c1b3a0a8c
font_01_sfnt_off0000ffe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE1 11108 bytes
SHA-256: 6e902e98410e06588bc157e62939394c93e9cf88049724cc782ad1df6398ef7d

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