Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cb18a5ce538001c…

MALICIOUS

PDF

74.7 KB Created: 2021-01-05 06:18:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: bd86fd3dc1ab9c6f2d0d0fdbda5b42b6 SHA-1: e888c6a475fb1a86079cd805774682425e503103 SHA-256: 9cb18a5ce538001c9e1ba9da9799aa5cd543071ff3426c0a8726f4f74a4b2597
186 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 hosted on disposable domains, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs, such as 'https://trafftec.ru/aws?utm_term=best+bollywood+movie+2018', are used to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/aws?utm_term=best+bollywood+movie+2018 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379029/normal_5f8f602d52327.pdfIn PDF document text
    • https://varovofuzurido.weebly.com/uploads/1/3/4/5/134598094/8f8698c70a512.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461232/normal_5fe4e581b2b38.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365547/normal_5f870741e5377.pdfIn PDF document text
    • https://judamuguduvawa.weebly.com/uploads/1/3/4/3/134352100/mefusofabawipepujure.pdfIn PDF document text
    • https://tewodoxes.weebly.com/uploads/1/3/4/3/134368692/vudovutonewabe.pdfIn PDF document text
    • https://viwosakizipisot.weebly.com/uploads/1/3/5/3/135321869/a77c0ad.pdfIn PDF document text
    • https://kimiragijasem.weebly.com/uploads/1/3/4/0/134096233/3461136.pdfIn PDF document text
    • https://fejamelaluboj.weebly.com/uploads/1/3/4/3/134311679/5753802.pdfIn PDF document text
    • https://dizawiwutap.weebly.com/uploads/1/3/4/6/134629961/gopozomaxarajem_ramekapawuv_tuvonekatijinoz.pdfIn PDF document text
    • https://pemezexuz.weebly.com/uploads/1/3/4/5/134585882/3405743.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tujeviwakirawu/angularjs_directive_create_dynamic_template.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/hydint_auto_drain_valve_manual.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_off0000e6e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E3 5628 bytes
SHA-256: a71409c0f5d17b25c22fc73173ef07a3d46b5d5256d57408f7dad5e737a995aa
font_01_sfnt_off0000fa1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1B 10740 bytes
SHA-256: 5882fd4ec3107e51959c7eb9240649154a60aee449ecb7afc054a98b266bd3f2

Open this report in the interactive analyzer, or submit your own file for analysis.