Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe1d9bbb81f0d938…

MALICIOUS

PDF

76.9 KB Created: 2021-05-24 10:51:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: e24f4ceeb1ad6c4a95d2cf8b3665e313 SHA-1: d70fccc2fbea0964f3a63ba27eb12e714d3044b5 SHA-256: fe1d9bbb81f0d9384b8aa3f47b0bc07de4a0e97ed7606290e0b5e90ca470cf9c
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or distributing further malware. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, and ClamAV detected it as 'Pdf.Phishing.Trojan'. The embedded content, though obfuscated, suggests a lure related to purchasing a car, aligning with phishing pretexts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • 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://seumenha.ru/strik?utm_term=how+to+buy+car+from+true+value PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4387919/normal_5fcae1a95c5c4.pdfIn PDF document text
    • https://bizitaninajoki.weebly.com/uploads/1/3/5/3/135316521/beribegupipaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380226/normal_602331dc01791.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417526/normal_5fe826185ec83.pdfIn PDF document text
    • https://gavuwili.weebly.com/uploads/1/3/1/0/131070236/xenaturexelomewo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458412/normal_605a67c3d9891.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455670/normal_5fd1e78e891db.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405660/normal_60012dcb74d1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428054/normal_6049060b51bfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4503767/normal_601ac2494a757.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408188/normal_5fe2f7f0dcb22.pdfIn PDF document text
    • https://milixugaxezo.weebly.com/uploads/1/3/1/8/131856079/2395435.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365555/normal_600432040b3bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379984/normal_606e230b90df1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463529/normal_5ff8a4a9baf40.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/8e4b79b4-2c1e-49ba-9b0b-78d0bd95f065/echo_srm_225_string_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8bc0282-2e5e-4b1f-99e4-75e0f3119c7a/zototaletu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c70849a1-dbd5-441f-854f-4dc8ca768dda/78631750465.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acac3ad6-9be3-4e38-922e-1d8a08045f86/38475684045.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b1b8102-2547-4fd1-8bd4-8186489ba10f/object_oriented_analysis_and_design_lab_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0378b225-cb13-4377-9522-179a35b98ade/jerry_garcia_guitar_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9640a86c-ad22-4e65-9f46-344b01541efe/loxel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c46e11c-7f4e-42e9-893d-226ca3a6c10d/luxudejemanemamaterod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfab59cb-987c-4ade-aec8-760e396eefbf/33647644832.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11b21945-f210-4271-a434-27313c288b38/jedoxemirurobab.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_off0000ee9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9E 5204 bytes
SHA-256: 36152719c9db57b2b9cdc04d5d4bc72d50fe8114b79cc5973d353f2946fb3022
font_01_sfnt_off0001005b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005B 11192 bytes
SHA-256: e36440f4236b581af72e52ce56452265c725f66be604d684ca244402bf1edb04

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