Malicious PDF — malware analysis report

Static analysis result for SHA-256 323856bc807f1e1e…

MALICIOUS

PDF

82.5 KB Created: 2021-04-04 10:11:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b31371e50a062898b4240b4e17a11344 SHA-1: e99b0d61578c7691b64e481db90402a677abb32f SHA-256: 323856bc807f1e1e149a1f22da519852697a87f01217a9e065b63a406221f823
146 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. It uses a callback-phone (TOAD) lure. 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 0.9990

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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://xajibur.ru/strik?utm_term=how+do+i+cancel+a+rodan+and+fields+order PDF link annotation
    • http://kzrovk.xyz/pomugunagoqbtvh.pdfIn PDF document text
    • http://gufutaca1.xyz/the_quran_in_english_audio2u2yy.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/ihfwZ8N/outbreak_cast_monkey.pdfIn PDF document text
    • https://cdn.sqhk.co/fenazijeguk/hgigugj/rifodu.pdfIn PDF document text
    • https://cdn.sqhk.co/rotonoba/bgj0PYs/bigo_live_tv_apk.pdfIn PDF document text
    • http://wisecredit.info/vizio_sound_bar_componentsokr27.pdfIn PDF document text
    • http://masito.space/email_template_for_launching_a_new_product8eeto.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/WLGWi0l/juegos_de_jungle_monkey_run.pdfIn PDF document text
    • https://cdn.sqhk.co/kizulajeli/Trgc4Yb/93657308711.pdfIn PDF document text
    • http://cocobuka3.xyz/world_war_pc_games_strategy4ph0b.pdfIn PDF document text
    • https://cdn.sqhk.co/tuwetebep/9idjbjj/ghost_rider_bike_wallpapers_wallpaper_cave.pdfIn PDF document text
    • https://cdn.sqhk.co/sixojifez/xjgjhhh/wepalaboduvoxegetadif.pdfIn PDF document text
    • http://copyrightsupport-ig.com/maytag_gemini_stove_topfn16x.pdfIn PDF document text
    • https://cdn.sqhk.co/padasagam/ijahchb/wasokugonokes.pdfIn PDF document text
    • http://sodalabs.pro/ryobi_410r_tillerqf247.pdfIn PDF document text
    • http://uscovidcharts.com/46512158067iosty.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9809caba-b00d-47c0-bdd8-2bdf76ebe85d/the_republic_grille_the_woodlands_tx_77381.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a403ae9b-846b-4192-85de-280f6a4765d4/vanuvenunatisezilug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8904201-039f-403e-91b7-ba498bedf761/joripikupawepifeguniv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a16ca044-8624-4e56-8493-1c8c5a4f86bb/how_to_start_st_croix_pellet_stove.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99a190c8-dae5-4d17-b8dc-5e66882a5a1d/31209636210.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/150171dd-fa23-4b75-90a6-260a7e72a382/soviwexaxowajegavetak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac852bd9-c821-4c2f-bf2d-a6446aa50f33/50762231396.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e50f8812-4dbd-4d86-a069-a6c977da3759/legiwita.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/001cf89a-403b-46b7-bc93-5880bcf742cb/netgear_gs116lp_review.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_off0000f7f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F5 5068 bytes
SHA-256: 3aaee6aede22af576cdd97fe51a8e1a7503a4d2f9467a8ba1fec4e0eff517555
font_01_sfnt_off0001094a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094A 1832 bytes
SHA-256: 886313929a2a840396a9efe1236b0f91371ac8de8ce80438e8dc898f1383658c
font_02_sfnt_off0001124a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1124A 11792 bytes
SHA-256: 4d28b54e23a99c47a29f991fd5778bd1c567caccf5591ba2498340724f269056