Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dbec2e0a04636ec…

MALICIOUS

PDF

81.7 KB Created: 2021-03-20 05:50:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 36c824c4a93bb8c60fcc37d3b3e1f227 SHA-1: 16ce0fe8addadf2bdd13adb3a8942be72991a3a0 SHA-256: 5dbec2e0a04636ec30906c529ab0d0bcae1f4f5115a4bd9af12fe49887779b6b
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 0.9992

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://golowaki.ru/strik?utm_term=ingenuity+boutique+smartsize+gliding+swing+and+rocker+-+bella+teddy PDF link annotation
    • https://cdn.sqhk.co/kajurineg/gyfxhJc/37383044598.pdfIn PDF document text
    • https://cdn.sqhk.co/gogerazina/fXjd2hb/download_game_slap_kings_mod_apk_android_1.pdfIn PDF document text
    • http://sejerodetupumil.medianewsonline.com/63583797214.pdfIn PDF document text
    • https://cdn.sqhk.co/zizenozi/gi3ihhj/vikings_season_6_ivar_and_katya.pdfIn PDF document text
    • https://cdn.sqhk.co/zirigajer/Bhggex5/head_of_sales_asset_management_salary.pdfIn PDF document text
    • https://cdn.sqhk.co/nisugavu/QdQo9hd/modern_combat_5_esports_fps_gameplay_pc.pdfIn PDF document text
    • http://repaircreditscore.info/ham_radio_deluxe_v5_manualko859.pdfIn PDF document text
    • http://wurilozi.scienceontheweb.net/kuvalavonudafup.pdfIn PDF document text
    • https://govonomuvilikiw.weebly.com/uploads/1/3/4/6/134620083/letotubelovewin.pdfIn PDF document text
    • http://beautysale.site/difedezipuno8y75.pdfIn PDF document text
    • http://com-signto6.xyz/noco_genius_g750_6v_12v_.75_amp_battery_chargerv96ey.pdfIn PDF document text
    • https://cdn.sqhk.co/fiwujumejuf/tiamqwG/gmail_new_logo_2020.pdfIn PDF document text
    • http://zeruzatuton.22web.org/voltage_divider_circuit.pdfIn PDF document text
    • http://zesamoa.online/can_a_9mm_kill_an_elephantht8mg.pdfIn PDF document text
    • https://bivorafonesakal.weebly.com/uploads/1/3/6/0/136021739/6f3b9e8.pdfIn PDF document text
    • http://xepidenad.scienceontheweb.net/bexalufavukekunub.pdfIn PDF document text
    • http://polfact.site/dragy_app_no_internet_connectionmkja4.pdfIn PDF document text
    • https://fubapisa.weebly.com/uploads/1/3/1/4/131406294/d0cf47a5a53a.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/5152066.pdfIn PDF document text
    • https://cdn.sqhk.co/tesosunimew/hIjihhV/uae_exchange_rate_today_nepal_rupee.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
    • http://padusij.onlinewebshop.net/serajuzamivoxatosad.pdfIn PDF document text
    • http://gubadif.myartsonline.com/numerical_methods_bisection_method.pdfIn PDF document text
    • http://revobisamapekuz.epizy.com/21225301871.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_off0000eed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED4 5684 bytes
SHA-256: ec71dc3c9ccfa742b69abd54589e78f96f9f3c0c14e69bd6f61e72607f6ff8a1
font_01_sfnt_off0001021f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1021F 11960 bytes
SHA-256: 5b9afdaa59a794a935d68ec51514e3232f35237e6346d228c2860f4d350af3cf
font_02_sfnt_off00012a9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A9D 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3