Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad1647ec13b8883e…

MALICIOUS

PDF

80.9 KB Created: 2021-03-11 22:04:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 7914586702a495c300d90c96f74d3357 SHA-1: 9b80a823a0ea1b6f8beeb0c491adfd05f4ea524e SHA-256: ad1647ec13b8883e6db251d1abf7b5c6a1fde4c51a60fb1f619240d162277a13
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to link farms hosted on disposable domains, suggesting a tactic to manipulate search engine results or distribute malicious content. The presence of external URIs and the link farm heuristic indicate a primary function of redirecting users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://golowaki.ru/wix?keyword=8th+house+sun+father PDF link annotation
    • http://fawetugamuxix.66ghz.com/jdk_8_windows_xp.pdfIn PDF document text
    • http://lebepufu.mypressonline.com/is_there_an_app_that_can_solve_math_word_problems.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/NRDjdig/vefolawerafukejibem.pdfIn PDF document text
    • https://cdn.sqhk.co/vasinabew/dFjjdYN/house_flipper_dlc_for_xbox_one.pdfIn PDF document text
    • http://pajiweputuniwas.iblogger.org/attagasam_movie_songs_in_masstamilan.pdfIn PDF document text
    • https://cdn.sqhk.co/dasofuduveje/cjbBhdL/khan_academy_mappers_parent_letter.pdfIn PDF document text
    • https://cdn.sqhk.co/xubewarow/ifhe6je/29043453614.pdfIn PDF document text
    • https://cdn.sqhk.co/vitimosugu/djfkqii/48471120222.pdfIn PDF document text
    • http://xisulekotitis.iblogger.org/59962414522.pdfIn PDF document text
    • https://cdn.sqhk.co/bedogipaxog/hdlOvQJ/downloader_for_tiktok_video_download_no_watermark_nulled.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/hcUeWgd/57841672472.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pekamidakoj.atwebpages.com/the_sense_of_an_ending_explanation.pdfIn PDF document text
    • http://ziwejozaz.epizy.com/update-_alternatives_auto_vs_manual_mode.pdfIn PDF document text
    • http://fakexebubigej.rf.gd/63986894290.pdfIn PDF document text
    • http://sijopar.epizy.com/train_mod_for_minecraft.pdfIn PDF document text
    • http://rulamiji.onlinewebshop.net/nokodinojisaguvigumonew.pdfIn PDF document text
    • http://nisetekotixob.myartsonline.com/le_petit_prince_film_danimation_franais_complet.pdfIn PDF document text
    • http://vomifavub.epizy.com/97540068138.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_off00010117.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10117 4920 bytes
SHA-256: 8ccb35d395d8a6772e1496de1c0dbefa411aa1f0e62c435ac21f605f1870db97
font_01_sfnt_off000111cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111CB 10772 bytes
SHA-256: 4f019dd3dac9db60470f22b0ae3a34d40bd6ab1295520903862c1468f14a573e

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