Malicious PDF — malware analysis report

Static analysis result for SHA-256 01941fcc7001d173…

MALICIOUS

PDF

72.1 KB Created: 2021-06-03 22:09:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 65fdb28111c95266ac4bd90e28689225 SHA-1: 9784c3319eb4f4ccb2de0c857bd33e14e66671d5 SHA-256: 01941fcc7001d1738b5f83a671f8dc8a51deb7ca13653f15bdf05991e93da189
186 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan by ClamAV. It contains a large number of external links, many pointing to disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious sites. The document body, though heavily obfuscated, indicates a theme of 'lease renewal' to lure victims. No scripts were extracted, but the overall structure and link farm behavior are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://infrive.ru/pbw?utm_term=how+to+write+up+a+lease+renewal PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370089/normal_5fe798981ed58.pdfIn PDF document text
    • https://senabexe.weebly.com/uploads/1/3/4/2/134265557/kojozimagaku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467573/normal_603e7ca4c6e9c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371786/normal_6017899617b28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465012/normal_605328ee28f90.pdfIn PDF document text
    • https://zokofefedepop.weebly.com/uploads/1/3/1/4/131437243/3481810.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450251/normal_6021b9b618320.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495858/normal_5fce3ab3101ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457857/normal_5ff078684427c.pdfIn PDF document text
    • https://woxogobigevi.weebly.com/uploads/1/3/0/8/130814596/goxetutenipovogisufi.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/eeac63a9-097a-4a15-9e63-5abd5f81d58d/gekakakabulikeb.pdfIn PDF document text
    • http://dekokos.pbworks.com/f/last_day_on_earth_hack_ios_2020.pdfIn PDF document text
    • http://kepigiwup.pbworks.com/w/file/fetch/144501159/24566873835.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d93458db-e72b-4146-8d50-ee1fdbe007bf/why_is_the_year_based_on_christianity.pdfIn PDF document text
    • http://pupowivala.pbworks.com/w/file/fetch/144426813/62458200751.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb86b905-3a5e-4492-99b5-0e25298cdbaa/82767110280.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf619d30-f045-4bd0-84e7-d79a713fe989/55419502180.pdfIn PDF document text
    • http://mupalunava.pbworks.com/f/dikijewufesetoxudunu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ded6308-d157-406d-ae83-5442186b458c/what_is_the_machine_used_for_morse_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2c1fbeb-cd4b-45f5-acdc-7c44c0baca90/sesukem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdcf9c23-2622-417c-bd4d-9b49b56e84d7/how_far_is_the_tropic_of_cancer_from_the_equator.pdfIn PDF document text
    • http://zowonixepor.pbworks.com/w/file/fetch/144460986/how_to_speaking_better_english_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ff509c9-04f1-441d-ba38-3b2fd9197313/dean_koontz_devoted_book_club_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/225b030c-2e2d-4d33-8109-fee285dbd557/akbar_birbal_cartoon_in_hindi_download.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_off0000de84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE84 4868 bytes
SHA-256: fd550a35c323430fc34342d388e38eb293d6ff64e0feaa8227fa3d8a1b9a7a8e
font_01_sfnt_off0000ef28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF28 10528 bytes
SHA-256: a0d39136ae0a687764a01ae3322438ba59fc9842d97f157b45bbec11e977c124

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