Malicious PDF — malware analysis report

Static analysis result for SHA-256 11372294e74388a6…

MALICIOUS

PDF

102.9 KB Created: 2021-05-26 04:48:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: d1f8a0f19bc95230aa4edc80dd7d5677 SHA-1: 053f5d1058d4507841560054671bee965250bee4 SHA-256: 11372294e74388a61b7c5e075e738cfec85fe24ecffe21bff3e9d16a9a87d91f
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic indicating a link farm with numerous external links, with one prominent URL pointing to 'bologen.ru'. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the PDF structure and external links are indicative of an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/strik?utm_term=los+niveles+de+intervencion+en+trabajo+social PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366324/normal_6024b992b3a55.pdfIn PDF document text
    • https://bagibobujinokat.weebly.com/uploads/1/3/5/3/135312275/zojafav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447647/normal_601dd5fb8b00e.pdfIn PDF document text
    • https://guvijubeb.weebly.com/uploads/1/3/5/3/135318684/b1471a.pdfIn PDF document text
    • https://sevafigetof.weebly.com/uploads/1/3/4/9/134902911/remibodegit-zawiviwasega-jedud-riwivumo.pdfIn PDF document text
    • https://babewepuk.weebly.com/uploads/1/3/4/3/134311046/fivavub.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/7c0470eb-1244-4708-96cf-f15d70d912cf/96363046858.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/3286846212.pdfIn PDF document text
    • https://s3.amazonaws.com/piradi/29477414810.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/java_jdk_7_for_aix.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/rederug.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/55832059905.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c1f3042-0ca6-4841-a497-658a944e3add/black_and_decker_drill_battery_14.4v.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/parometoparakekigo.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/37177061823.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40ec9d22-d182-4d6e-99a5-d3ea9f82f556/98257079196.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/list_of_irregular_spanish_verbs_in_present_subjunctive.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/98394962553.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/dashboard_excel_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wegugus/solving_quadratic_equations_mixed_worksheet_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gujutavevive/biocentrismo_libro.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_off00015434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15434 5148 bytes
SHA-256: 04cde6f9b694bf9f5d6f3368d9c2a3759163c72df74eb3446cbe4db6b6119e52
font_01_sfnt_off000165cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165CD 12444 bytes
SHA-256: d33c9100cb536c904363be2bb94a4ac37246bb8407458c577f1b02dcf4b56d9b

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