Malicious PDF — malware analysis report

Static analysis result for SHA-256 c001d5545e797d05…

MALICIOUS

PDF

69.0 KB Created: 2021-04-08 08:23:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: d3af2256e72c4625b66d3b17c33d7b1d SHA-1: 37510a8bf996e4e4cfa79cad6a0e96d20da93e8d SHA-256: c001d5545e797d05fb6a746de5496402dfb79d10bf4aa26529b1febf53c2a0a3
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The presence of multiple external URIs and the overall structure suggest it's designed to redirect users to potentially harmful content or facilitate further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/wix?keyword=craftsman+garage+door+opener+manual+139.539 PDF link annotation
    • https://kuxiwapanipajof.weebly.com/uploads/1/3/0/9/130969705/9152248.pdfIn PDF document text
    • https://wogalipa.weebly.com/uploads/1/3/4/3/134316604/fomam.pdfIn PDF document text
    • http://goxopisejeza.22web.org/15588801054.pdfIn PDF document text
    • https://levufiturosotin.weebly.com/uploads/1/3/4/4/134466711/a344f98bd45b6.pdfIn PDF document text
    • http://lidagejelotodu.22web.org/board_size_and_firm_performance_literature_review.pdfIn PDF document text
    • http://ravigimojamel.mypressonline.com/geography_of_ancient_greece_map_skills_worksheet.pdfIn PDF document text
    • https://kuvixutag.weebly.com/uploads/1/3/4/3/134347355/dffb3bb38fd0821.pdfIn PDF document text
    • http://inmyshtangen.xyz/english_exercises-past_simple_tense_irregular_verbsaq8gf.pdfIn PDF document text
    • https://xetinize.weebly.com/uploads/1/3/2/6/132695894/4730943.pdfIn PDF document text
    • https://wevumofanefaso.weebly.com/uploads/1/3/5/9/135964816/1de5ef57f3d.pdfIn PDF document text
    • http://sbrf.link/kobiratopbvj6u.pdfIn PDF document text
    • http://suberubepuparo.getenjoyment.net/2849717776.pdfIn PDF document text
    • https://kewekekonuv.weebly.com/uploads/1/3/4/7/134732265/rijizodudaloxobun.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jujovotusenugo.epizy.com/nulimifita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4590b3f7-5445-4836-9762-1b77ebd246ae/maze_runner_the_scorch_trial_cast.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1de12c23-02a7-4081-b80b-10ab9cdeaaca/what_should_be_included_in_a_speaking_outline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f08a4eb9-25f9-4ec9-af0d-40a21520dce1/vukegabisamibuwaxolopa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16782674-846d-4b8a-bccb-5e5648c691a4/68986696640.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4085358d-3bfd-49b5-a7f5-ca42b7c0aa03/nkjv_leather_bible_for_sale.pdfIn PDF document text
    • http://mojogoralil.onlinewebshop.net/apprendre_l_arabe_algrien.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_off0000d0b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B0 5792 bytes
SHA-256: 29c622d529fd5366aeec49e7355eadb6a5ab37a759c42f5e7319fa6a88b78038
font_01_sfnt_off0000e45e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE45E 10008 bytes
SHA-256: 3362771486389efb682f98349cdf25abeadb225b19d90bcc6f93694b1ab13d32