Malicious PDF — malware analysis report

Static analysis result for SHA-256 aba2730c114dbdf5…

MALICIOUS

PDF

71.3 KB Created: 2021-03-22 12:44:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f2669baf474c666a105dc66904bf30d3 SHA-1: cacf98dd29e040ef384c8a877a3a8826774f7529 SHA-256: aba2730c114dbdf5ab17c9016d0cf8dcc78370b5e8e3a7a31678cd50134e29f4
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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 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.
  • 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://crophysi.ru/award?keyword=bhagavad+gita+full+english+pdf PDF link annotation
    • https://fivomatimib.weebly.com/uploads/1/3/1/0/131070631/walipo.pdfIn PDF document text
    • https://cdn.sqhk.co/widagawinud/7n9Gy4Q/jungle_flycatcher_diet.pdfIn PDF document text
    • https://cdn.sqhk.co/tewokozogop/n8JgdwZ/xikexerotemuz.pdfIn PDF document text
    • https://cdn.sqhk.co/fenogate/jhjgSx2/sakura_school_simulator_ios_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvexajamu/ia1icha/run_rabbit_run_100_results_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/webepinovet/QVgbLhe/wugatorusunoruj.pdfIn PDF document text
    • http://ttop-shop.com/amantes_del_desierto_capitulo_120clzsu.pdfIn PDF document text
    • http://fullcreditreport.info/best_way_to_beat_1_3_1_zone_defensem98cp.pdfIn PDF document text
    • https://wimekigulaz.weebly.com/uploads/1/3/1/1/131163744/803519.pdfIn PDF document text
    • https://cdn.sqhk.co/fofodafexadu/aDieiid/wakofowiferukus.pdfIn PDF document text
    • https://cdn.sqhk.co/rubalibuzodi/iffvgc5/mokosumega.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/dhejijb/download_game_idle_galaxy_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/hjChgii/universal_studios_orlando_islands_of_adventure_rides_list.pdfIn PDF document text
    • http://reduslim-eu.site/vekazanudugurazewekoy1oe2.pdfIn PDF document text
    • http://vuvuga.xyz/69011477210udlce.pdfIn PDF document text
    • https://sepolekabu.weebly.com/uploads/1/3/1/6/131606201/bagowevetenunusowod.pdfIn PDF document text
    • https://pepadamive.weebly.com/uploads/1/3/4/4/134468065/8baf7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kugibujupedo.rf.gd/boyz_n_the_hood_movie_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/origami_darkness_dragon_instructions.pdfIn PDF document text
    • http://jasagedonemope.epizy.com/xijaxujuwawutajod.pdfIn PDF document text
    • http://sudiwoke.epizy.com/financial_management_excel_spreadsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/87550404789.pdfIn PDF document text
    • http://vuduluxepo.epizy.com/mafagurepe.pdfIn PDF document text
    • https://s3.amazonaws.com/zafibimutadoti/wall_street_prep_financial_modeling_best_practices.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_off0000d8e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E5 5316 bytes
SHA-256: 8cd9efacb967d78f07896147d80bf80ce693fe665904adb64d589a60b264a8d0
font_01_sfnt_off0000eb11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB11 10772 bytes
SHA-256: 3cf702e45e14f07955ee217e1cad64517fbc29c0a2149e9f59f24ab63ca5fbd3

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