Malicious PDF — malware analysis report

Static analysis result for SHA-256 261b79d7edb8b869…

MALICIOUS

PDF

67.1 KB Created: 2021-02-17 13:19:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e1497645a8e87eaaa17c6606799f6685 SHA-1: ab7fabaf15f94cddd9300c3697bb3af79026fe63 SHA-256: 261b79d7edb8b8696f9e4e0e13d3047146b133b100bb5bf3dbd5cffc0f224e7f
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a website disguised as a manual for a 'Karr alarm 2040'. This URL is likely used to host malicious content or phish for user credentials. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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 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://leonvi.ru/wix?keyword=karr+alarm+2040+manual PDF link annotation
    • https://xasedomag.weebly.com/uploads/1/3/1/0/131071243/pewetupobafig.pdfIn PDF document text
    • https://varijiligedag.weebly.com/uploads/1/3/1/3/131383591/669352.pdfIn PDF document text
    • https://wosabizovores.weebly.com/uploads/1/3/4/5/134577485/4607951.pdfIn PDF document text
    • http://hookup157.online/arijit_singh_songs_201861c7f.pdfIn PDF document text
    • https://cdn.sqhk.co/xixujipum/jbkhLbx/mercado_pago_peru.pdfIn PDF document text
    • https://litufefanim.weebly.com/uploads/1/3/4/9/134901191/jefojipoxuvif.pdfIn PDF document text
    • https://cdn.sqhk.co/pozedezupase/ahjXz6b/85240490969.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/jujojomojemiz/funny_poll_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nilititonawafim/chalice_guide_destiny_2_reddit.pdfIn PDF document text
    • http://fotafufoka.epizy.com/3_bachelors_movie_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/37347392596.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_off0000cba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA1 4984 bytes
SHA-256: 8673fd2487d7ed232bbe929b3ad99ef77bd4031f905b9c59061540fc4b5f7b3b
font_01_sfnt_off0000dc86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC86 10444 bytes
SHA-256: f6d5547ed86818f6fe806c8deb600b49476a8f07b374917f0ecd0976785e9c9d

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