Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddedab1d3b20d1b7…

MALICIOUS

PDF

74.8 KB Created: 2021-02-13 05:45:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 0ef7902f612e93d94fab80a6e80b13a5 SHA-1: ca21e25dcbe111c600489bb2820e127718ffb110 SHA-256: ddedab1d3b20d1b791c6edec55eae90a00561605888be260d6871eb1bda4dd13
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, appears to be a lure related to 'kitchenaid mixer repair manual pdf'. The presence of external URIs and the overall structure suggest an attempt to redirect users to malicious sites or download further payloads.

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://leonvi.ru/wix?keyword=kitchenaid+mixer+repair+manual+pdf PDF link annotation
    • http://mandarins.space/cara_mudah_hack_wifi_id_di_androidvl3ck.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425224/normal_5fe801dd12692.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465386/normal_60218c11a7792.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426415/normal_5fee1943e9b82.pdfIn PDF document text
    • http://winoraama.space/jekukoksfnex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452861/normal_5ff59d5080dd9.pdfIn PDF document text
    • http://probkin34.xyz/d_d_codex_unearthed_arcana4yy3w.pdfIn PDF document text
    • http://gebuhrenfrei-mein.com/john_lamb_nash4o7a6.pdfIn PDF document text
    • http://waystep.site/893145997626c6o8.pdfIn PDF document text
    • http://swast-group.website/milufalifemonixupemekoledjt5bw.pdfIn PDF document text
    • http://dfds.in/robotics_modelling_planning_and_controlvt50x.pdfIn PDF document text
    • http://naturfresh.fun/vawevofusex8gtuf.pdfIn PDF document text
    • http://sluzhba1.net/409265024834x7rc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE864 5256 bytes
SHA-256: ebcf03b7347851bca2dc679ef18f7dc3d5edf66acf3867c33ab87c580367f068
font_01_sfnt_off0000fa23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA23 10732 bytes
SHA-256: 7f2e3c3cc35e372d3e8781fd1bc20d2fc7663481cceef85085908e8e9e846081

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