Malicious PDF — malware analysis report

Static analysis result for SHA-256 a26e8d7e0d7e0dc7…

MALICIOUS

PDF

72.6 KB Created: 2021-02-21 06:25:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: e2ff557e463fd4107c78c6e2faa671f9 SHA-1: 2c202cd42502b63c6cfddebb04871c6251d9289e SHA-256: a26e8d7e0d7e0dc721a3f470df0351cf29f339d95b7a47d8aa812d194b416548
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, suggesting a phishing or malware distribution scheme. The presence of 'utm_term' parameters in some URLs indicates an attempt to track user engagement with potentially malicious content.

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://maypoin.ru/123?utm_term=ged+math+worksheets+2019 PDF link annotation
    • http://myluckybet.xyz/bapujulaark5e.pdfIn PDF document text
    • https://cdn.sqhk.co/kagumuzom/gigmUfb/49657692913.pdfIn PDF document text
    • http://timurberg.ru/adobe_captivate_8_free5qv3h.pdfIn PDF document text
    • https://cdn.sqhk.co/kominepoli/ig21N3e/koi_fish_tank_size.pdfIn PDF document text
    • https://cdn.sqhk.co/linidivez/fhbjehg/palitilutogifiniwusifadib.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477137/normal_5fed58db95996.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385413/normal_60171f7e69724.pdfIn PDF document text
    • https://cdn.sqhk.co/xezafube/jiiXig8/telegram_movie_download_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/gaxudofexal/euhf4DA/understanding_your_home_s_electrical_system.pdfIn PDF document text
    • http://juvugewit.iblogger.org/frigidaire_fad704dwd_energy_star_70-pint_dehumidifier_with_effortless_humidity_control.pdfIn PDF document text
    • https://cdn.sqhk.co/werutojij/UieemZD/parler_app_download_numbers.pdfIn PDF document text
    • http://qwertyujg.xyz/diwasevuzekajiwusenurofasv0amf.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/novifamigot/fakifodirinasujobevelobom.pdfIn PDF document text
    • https://s3.amazonaws.com/jivala/cartoon_video_song_for_child.pdfIn PDF document text
    • http://rizegewu.rf.gd/how_many_ohms_is_a_fender_twin_reverb.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/sotojegarurin.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE8 5704 bytes
SHA-256: 5f6de82f397fe6a31c47973e2bf581977bd12ba457314594c02325073c1f7132
font_01_sfnt_off0000ee30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE30 11576 bytes
SHA-256: dc8a52312df5817ce42017ab20a1ad304f4fdf5809d0b0abbf02ee707852edb1

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