Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1fe5147745b7311…

MALICIOUS

PDF

67.8 KB Created: 2021-04-04 10:14:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 1669ac50e87d5bd0dad41320a7410886 SHA-1: a8545a283bd78b140e2bab3fa97857f41cf9b305 SHA-256: d1fe5147745b73116f3412e2489285b72854f85e4bd8d46cdfc2bcbd0e510779
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to disposable hosting services, indicating a link farm designed to redirect users. The presence of a 'utm_term' parameter in one of the URLs suggests a phishing or SEO manipulation attempt. ClamAV and ML classifiers also flagged this file as malicious, likely due to its deceptive content and link farm structure.

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://jacksth.ru/strik?utm_term=massey+ferguson+1030+parts+manual+pdf PDF link annotation
    • https://buvelixajotoneb.weebly.com/uploads/1/3/5/9/135982000/aa35e.pdfIn PDF document text
    • https://wugoxuvalego.weebly.com/uploads/1/3/4/0/134017666/88d2f86c745b.pdfIn PDF document text
    • https://luxaxezasu.weebly.com/uploads/1/3/1/3/131398230/fuxirosifozudi_fejum.pdfIn PDF document text
    • https://babuzusevajuwo.weebly.com/uploads/1/3/4/8/134878483/xerotexarawavutagu.pdfIn PDF document text
    • https://voxivunesiru.weebly.com/uploads/1/3/1/4/131407918/regurumazut-piwalopemewid.pdfIn PDF document text
    • https://rebazizezasij.weebly.com/uploads/1/3/4/5/134586802/bezemif.pdfIn PDF document text
    • https://lamosovi.weebly.com/uploads/1/3/4/6/134600354/fefotaz.pdfIn PDF document text
    • http://pisodaseveporow.22web.org/how_much_do_airmen_get_paid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6e37e838-c278-4d46-baa9-25b8497af200.filesusr.com/ugd/fbcb80_b5d0d4fe9ce148708d4c742eeafd0542.pdf?index=trueIn PDF document text
    • http://nupakavidowux.epizy.com/cours_d_agriculture_tropicale.pdfIn PDF document text
    • https://6d5fec37-5936-4ae8-8938-03a86e982f09.filesusr.com/ugd/d4da64_6d851a36efc5444f8d3db51edb879e04.pdf?index=trueIn PDF document text
    • https://5e0c4d4d-41f9-428c-9564-b93e7cff6769.filesusr.com/ugd/510691_d14d0518d4524e5083dc56817a1a59f8.pdf?index=trueIn PDF document text
    • http://zezevefo.rf.gd/gimp_photo_editing_tutorials_black_and_white.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8ddd458-db7b-436b-a46e-f864658aa454/65750007011.pdfIn PDF document text
    • http://mabobubokinevo.epizy.com/ihk_hannover_berichtsheft_vorlage.pdfIn PDF document text
    • https://a1b876fd-e98f-4594-996d-fc523792ae9e.filesusr.com/ugd/efcbf0_48a789263b8f48b98c7c83d8d0186fcb.pdf?index=trueIn PDF document text
    • https://748f1d53-d141-46c1-926a-d14fc69713a3.filesusr.com/ugd/e3ed1f_94cd665b02764619a0fa643cdcabe013.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4f3334b-9147-4e5a-b4a1-f093c34a7641/the_idea_of_justice_goodreads.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_off0000c9fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9FB 5824 bytes
SHA-256: dedee354008cbf13dde89402a21eb3a5e13557b5f3bf0293bf72e0f57b6f70d8
font_01_sfnt_off0000ddd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD7 10484 bytes
SHA-256: 7ac9777102efa68c284d8a05af990e2dde78901459fdba719422c43c1cc9fef6

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