Malicious PDF — malware analysis report

Static analysis result for SHA-256 174f342dab4b4cec…

MALICIOUS

PDF

75.5 KB Created: 2021-03-25 00:02:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 06ba88de3aee2f41d493614f884a3be8 SHA-1: 2a1f6b75a3b26dfe6d110488d8a6ee063a532da6 SHA-256: 174f342dab4b4cecc0d130f13218e1674d57e2511093d1ba6d6110baf0e16e5f
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous external URIs, many pointing to disposable domains and configured as link farms, strongly suggests a phishing or malware distribution campaign. The document body, though heavily obfuscated, contains references to search terms and application names, likely intended to appear legitimate while directing users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://pelibifir.ru/123?utm_term=zara+shoes+size+guide+uk
    • http://mebelintera.ru/wumikubibiji5m3x9.pdf
    • http://pifanaliriwabo.mygamesonline.org/86632172365.pdf
    • http://hookup154.fun/riseturanolokepupafogib448l9.pdf
    • http://erkutungotu.com/world_war_z_2bt05z.pdf
    • http://1gusevshop.space/stick_warriors_super_battle_war_fight_hack_apkgxns9.pdf
    • http://jirafka.space/hiv_aids_awareness_prevention_treatment_and_serviceskfo4z.pdf
    • http://insuranceautousa.com/civil_engineering_reference_manual_usedsz1wq.pdf
    • https://woxoxuwavi.weebly.com/uploads/1/3/4/6/134689382/vabulavil_woxuxodetu_jalagoxumujuzi.pdf
    • http://lnstagramverifiedbadge-form.com/21556374073m6uud.pdf
    • http://jobediniberine.scienceontheweb.net/17539681821.pdf
    • http://ita-bio.space/fuzatebavisagizaxaz1xv0z.pdf
    • http://exampl1214.com/sibijekotusoworoyr1x.pdf
    • http://arendagg.xyz/zutopadii6d3b.pdf
    • https://simiwulizolur.weebly.com/uploads/1/3/1/4/131455232/4255414.pdf
    • http://meetly.space/390499133138k0vs.pdf
    • http://pofuxubilet.sportsontheweb.net/nationalism_in_india_by_tagore_wikipedia.pdf
    • http://santecmb-sarl.com/71635215509b20pr.pdf
    • http://xitodefigatefuj.medianewsonline.com/34777585026.pdf
    • http://salonly.xyz/firex_smoke_alarm_model_fadc_4618_series_manual6m3s8.pdf
    • https://vuvowopivuvi.weebly.com/uploads/1/3/1/4/131410126/simititab.pdf
    • http://neuroncraft.online/10285751420735uz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/ede127be-1733-47e5-b964-e2dffd0f57ef/blackdecker_dustbuster_16v_lithium_hand_vacuum_chv1410l32_reviews.pdf
    • https://uploads.strikinglycdn.com/files/d9a35a86-5b42-4725-bc5d-360929089913/revujokobosowunolesuzer.pdf
    • http://zatuvejamubolo.atwebpages.com/business_environment_free_download.pdf
    • https://uploads.strikinglycdn.com/files/8ed6872c-0743-4372-abf2-d699b6223956/37279049509.pdf
    • https://uploads.strikinglycdn.com/files/894544c7-ecc7-4baa-8b89-0d5a17c1b305/cheapest_razor_e300_electric_scooter.pdf
    • https://uploads.strikinglycdn.com/files/49a462f6-dc67-4d85-a680-7bdd5145aac7/masavipuwibopot.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea12.bin
179eeef7bed9b8f8db6854410509f088314da294807710d3c953106cf223c79d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA12 5128 bytes
font_01_sfnt_off0000fb84.bin
200cf95c76d6974f7f469d9cfb315570c54889f5c56f68c7540820825089747e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB84 11184 bytes

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