Malicious PDF — malware analysis report

Static analysis result for SHA-256 97f32727201dc904…

MALICIOUS

PDF

87.7 KB Created: 2020-12-29 21:41:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 1049820dc8fcd14eecbe9cccb583d543 SHA-1: ede56a9c826ff1bc9dbc6c36c1b7032f6898629b SHA-256: 97f32727201dc9044456fef5728d6e847856875d23069c826f6bb53250fa90ea
186 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/strik?utm_term=draw+climber+app PDF link annotation
    • https://vadurevagide.weebly.com/uploads/1/3/3/9/133999829/bidomefolusos.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/a8401ec7a9859.pdfIn PDF document text
    • https://zuziraluxir.weebly.com/uploads/1/3/4/8/134899121/debajumigufisukexub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491445/normal_5fac3fd802eb4.pdfIn PDF document text
    • https://voruvagozi.weebly.com/uploads/1/3/4/7/134742827/9682030.pdfIn PDF document text
    • https://bojuwidus.weebly.com/uploads/1/3/4/6/134698781/4157575.pdfIn PDF document text
    • https://sipexagugiresu.weebly.com/uploads/1/3/4/6/134607427/721f7e04ad1993.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/d93408cc-d3cf-476e-9057-746f4369932c/heat_study_guide_3rd_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/rujuvaxilemivaginemaza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20cfaa6b-fed9-418a-8b9b-16a273049235/notodasekigoma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e04acac2-dcd7-4a66-93e1-f026c1aa9924/punukilazebewapetifipeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92d77dc8-6b42-4e8d-8bea-84073ec4537a/principal_coordinates_analysis.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0A5 12924 bytes
SHA-256: 791da24d083eadc143a640b5b756f79e5e6c259f7919d8defd2bfe5372bb5b5d
font_01_sfnt_off0000e84d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE84D 5132 bytes
SHA-256: 170dadb4d04c7231ffe51775904c89a4f3b410b8551736a868de9a0df6e44167
font_02_sfnt_off0000f9b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B9 9168 bytes
SHA-256: 05a21b1dfcdfb48b2ca15ea9795c634685c77ec247cd4de565cdd6341b79a064
font_03_sfnt_off000117d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117D5 9816 bytes
SHA-256: 1849f04946c55e4bb6f3a15b20a00f3d0222dff31bc48abfafc499a0c7dff577
font_04_sfnt_off0001398e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1398E 16576 bytes
SHA-256: 83ab882910d034f91011755e16c842eed430d67ecbf59075177bf0f98c1dfdd8

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