Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa5398b123ab1cce…

MALICIOUS

PDF

75.7 KB Created: 2021-02-25 15:57:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: b3acbc9fa4d257218d7c4376abf6dc8a SHA-1: 0aa7882b7be69035f3d95cbc0bf7a7f3df891fc0 SHA-256: aa5398b123ab1cce4aa8154588eafd0ab617371c190423a287fc0f5a6a489b77
194 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The embedded URLs likely lead to malicious content or phishing sites, and the document body, though heavily obfuscated, contains keywords related to book lists, which is a common lure for such attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://jottigo.ru/award?keyword=list+of+pema+chodron+books PDF link annotation
    • https://cdn.sqhk.co/fofateze/hi4geVV/cyberpunk_girl_wallpaper_1920x1080.pdfIn PDF document text
    • https://jutokikifugata.weebly.com/uploads/1/3/1/0/131070124/d862cf3ace.pdfIn PDF document text
    • http://vumonivaxozutod.mypressonline.com/35948667810.pdfIn PDF document text
    • https://cdn.sqhk.co/volinafi/etjghhL/sniper_shooting_battle_2019_mod_apk_unlimited_everything.pdfIn PDF document text
    • https://wexotagupoma.weebly.com/uploads/1/3/2/8/132814474/1d11043462d4de.pdfIn PDF document text
    • https://cdn.sqhk.co/tuminageka/if1hiTm/extreme_car_driving_simulator_mod_version.pdfIn PDF document text
    • http://de-bewertung-889562.icu/vofotipaselybzuw.pdfIn PDF document text
    • http://pasetbs.xyz/eso_necromancer_dps_champion_pointszp8ju.pdfIn PDF document text
    • https://cdn.sqhk.co/bujavenizake/6thbqYE/new_heavy_duty_tractor_pull.pdfIn PDF document text
    • http://itsamorem.com/2319808979961afb.pdfIn PDF document text
    • http://mklhhhh.space/casper_the_friendly_ghost_booktmot6.pdfIn PDF document text
    • https://cdn.sqhk.co/woberimi/hsEBdic/download_game_racing_horizon_unlimited_race_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/wozepefiga/dmBidid/32369686660.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xeruxaxer/fitokop.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/spotify_premium_apk_ios_tweakbox.pdfIn PDF document text
    • http://nejesezape.myartsonline.com/nasowemesu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE3A 5296 bytes
SHA-256: 8484eea0130650711396a09f663467feed53b281fdbee6db8f89d0ddde7ce7cb
font_01_sfnt_off0000f008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF008 10308 bytes
SHA-256: fe9e461b98fb6d88259d92b1ac0627c8bf44e08fe49c36146f1d05d9cc1f3346
font_02_sfnt_off00011368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11368 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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