Malicious PDF — malware analysis report

Static analysis result for SHA-256 f60d9b61ff1bb783…

MALICIOUS

PDF

73.9 KB Created: 2021-05-17 23:43:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: f6b7af439782cd9130f5818f2a2308a2 SHA-1: d16502f796a4b428b2f796e4cbe73f87c29f7990 SHA-256: f60d9b61ff1bb78382055ba95b636f4bc1106476cf534999d7bd477816f532f6
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are SEO-optimized PDF download links, indicating a link farm or phishing attempt. The primary malicious URL identified is dugedepap.ru, which is likely used to distribute malware or lead to further phishing pages. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • 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=reflections+of+a+man+2+pdf+free+download PDF link annotation
    • https://depopuxa.weebly.com/uploads/1/3/4/8/134893869/rajinivekuvetiwude.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369307/normal_6023f1b37148b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390081/normal_600516e124dcf.pdfIn PDF document text
    • https://mifevulesitiz.weebly.com/uploads/1/3/5/3/135321383/6372047.pdfIn PDF document text
    • https://sorebupewuf.weebly.com/uploads/1/3/4/4/134447244/towelazulaxi.pdfIn PDF document text
    • https://wuporebepumi.weebly.com/uploads/1/3/5/9/135981990/2103136.pdfIn PDF document text
    • https://deremorukoj.weebly.com/uploads/1/3/4/4/134490203/a172436d46.pdfIn PDF document text
    • https://xarirutufe.weebly.com/uploads/1/3/4/6/134659575/8343627.pdfIn PDF document text
    • https://lunidopufakim.weebly.com/uploads/1/3/4/4/134482460/rokinugaxituxaj-zofipexumofiku-dafem.pdfIn PDF document text
    • https://tijiwovewekodu.weebly.com/uploads/1/3/4/4/134456104/2babfda266dceb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488116/normal_5fd907d67d5d8.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/76803c36-6f8c-477b-a09b-b7644257db8d/casio_gw-9400_manual_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34562e7b-aa2d-4652-942b-8efcb1f981e3/maviwivejidawewomeded.pdfIn PDF document text
    • https://s3.amazonaws.com/mejobu/frequency_distribution_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/m_a_ka_full_form_kya_hoga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bf1c448-50aa-4620-8493-37b34983a21e/xulubepurijugeviselapogu.pdfIn PDF document text
    • https://s3.amazonaws.com/tozaduliwubega/90231868828.pdfIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/98998723004.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/mac_os_catalina_beta_3.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/evanescence_all_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/monowerelekomidekovasogu.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/jirexo.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/50023773747.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/doodle_god_apk_full_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bedb80be-256a-4ef5-ad1b-addd09f3bb6f/what_is_the_root_of_a_pimple.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_off0000df5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5D 5532 bytes
SHA-256: 7bbac120bf084b73e6872aaf14565b146caf7f58f7b06d47dec8ffae975bd1a1
font_01_sfnt_off0000f238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF238 11316 bytes
SHA-256: fe669a1eff767f997c965ad8fe4d7a840b48dce5258699852eb98f6e8cc80245

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