Malicious PDF — malware analysis report

Static analysis result for SHA-256 32480580833b8d3f…

MALICIOUS

PDF

64.8 KB Created: 2020-11-19 07:11:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: ca66cf91db23f4cb3154798dd7d4d3a5 SHA-1: 607b50079b691c94908b7573bf6e85ffd67904de SHA-256: 32480580833b8d3fa26b110e498ffb63fd0a57f9ce058ba144a1bdcf6cbe8a92
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it functions as a link farm on disposable hosting. The embedded URLs, such as 'https://traffking.ru/wb?keyword=beaune%20france%20tourist%20information', suggest a phishing or malware distribution attempt disguised as legitimate content. No scripts were extracted, but the PDF structure and numerous external links point towards an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://traffking.ru/wb?keyword=beaune%20france%20tourist%20information PDF link annotation
    • https://winapusumebut.weebly.com/uploads/1/3/4/6/134695108/jibomi.pdfIn PDF document text
    • https://pojozuwowate.weebly.com/uploads/1/3/4/6/134631913/vositirod-bidenetadusiv-gajafigix.pdfIn PDF document text
    • https://xawalovu.weebly.com/uploads/1/3/4/6/134652108/bivekum-runek-baleluzed-bezewe.pdfIn PDF document text
    • https://xogedagiwen.weebly.com/uploads/1/3/4/3/134398587/bemavi-gemesezefoguxob-dekigefunazo-gupinutomi.pdfIn PDF document text
    • https://bugekawimilu.weebly.com/uploads/1/3/4/5/134589579/sipitejenopeleten.pdfIn PDF document text
    • https://mofasabopileb.weebly.com/uploads/1/3/4/1/134109330/9483cd7.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/fasanag/icse_maths_book_for_class_10_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b275106c-9c5b-4a97-91ca-f75ca5e6b1d1/walulavuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98a54172-d207-4c71-865c-8c23056152ca/webaxinexulus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec887970-d6d6-4d39-9ff0-9649ea3eb28a/printable_alphabet_tracing_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/juzerilem/gurafukanaropawut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e98e54cd-c346-4008-9c47-2e88d99a47ff/iso_14001_checklist.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_off0000c1c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC1C9 5044 bytes
SHA-256: 876bd3844101f8dd01f46ea965d5c6bb07cfd3de5e637ae25b9b735b23fee214
font_01_sfnt_off0000d2e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E1 10864 bytes
SHA-256: 2d1b191ba5d98d43b550ac8ef92f2295356f3bf83e92e964288ee97cebb11d06

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