Malicious PDF — malware analysis report

Static analysis result for SHA-256 0347306e7fa050a1…

MALICIOUS

PDF

74.8 KB Created: 2021-05-04 01:29:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: ce64a710abaaa86f878c40952c90fb96 SHA-1: 2d3d38404bdafbee26189a69d614f21f19aefb7d SHA-256: 0347306e7fa050a1958de80f46aa1f1560c88563c01cc93227daf321f5fdcb07
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, with many pointing to disposable hosting and employing UTM parameters, indicative of a link farm designed to redirect users. ClamAV and ML classifiers flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were directly extracted, the structure and URL patterns strongly suggest a phishing or malware distribution attempt.

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://jacksth.ru/strik?utm_term=what+is+the+theme+of+the+story+the+road+not+taken PDF link annotation
    • https://cdn.sqhk.co/rujiwujik/bhaKasJ/jebexupuwi.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CDWhbqq/bamogapewinifusofenarilog.pdfIn PDF document text
    • https://cdn.sqhk.co/zaperarori/b89Mxjf/bemifafopagolokesoj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374976/normal_5ff857e603795.pdfIn PDF document text
    • http://pmaider.com/how_long_should_a_honda_shadow_last5hx30.pdfIn PDF document text
    • http://normab-id.com/metabolic_diet_meal_planhn8oq.pdfIn PDF document text
    • http://rapaliku.iblogger.org/welding_basic_ppt.pdfIn PDF document text
    • http://prizinsta.online/wamiwebalimuboqfsd7.pdfIn PDF document text
    • https://cdn.sqhk.co/pajijolabalu/fbvkAWl/drink_to_lose_belly_fat_in_4_days.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375908/normal_602cd7275be45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476285/normal_601dbb69e600c.pdfIn PDF document text
    • https://cdn.sqhk.co/fawabanof/lJbEcgj/love_quotes_for_girlfriend_smile.pdfIn PDF document text
    • https://cdn.sqhk.co/sexuzoropa/7MCzM2N/6562541647.pdfIn PDF document text
    • https://cdn.sqhk.co/tilesoxeg/jfhcidQ/bitibesivode.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416792/normal_6023c30a3b09e.pdfIn PDF document text
    • http://salet.store/39325357851p64bj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nafakosoleg.epizy.com/cashwagon_sri_lanka_apk.pdfIn PDF document text
    • http://wufizomofoduzin.rf.gd/5880041379.pdfIn PDF document text
    • http://baratak.rf.gd/16162896501.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_off0000e6e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E1 5292 bytes
SHA-256: 858f17b62107c5fde46fb12ab10935307eb88b19527338821452c066e16f0131
font_01_sfnt_off0000f8cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8CB 10892 bytes
SHA-256: 5063a28453b9fc6aa840901edbe7ee4f6311eb148d2873b2df65c038b806d1a4

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