Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad48bae602831f99…

MALICIOUS

PDF

83.3 KB Created: 2021-05-14 12:10:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 796094955eb52a12421ec3cf32d55b0f SHA-1: 505fab3e5e2f7c97d42a72d9cc423c53b7f8f687 SHA-256: ad48bae602831f99caa02745f19682d8ed04fbcab3984fb87332c57ad6419a5b
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 0.9995

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://jumiwimov.ru/strik?utm_term=iso+9001+training+cost PDF link annotation
    • https://cdn.sqhk.co/luwonowuwig/Z4MuWgi/slotventures_casino_games_and_vegas_slot_machines.pdfIn PDF document text
    • https://kadonomu.weebly.com/uploads/1/3/1/4/131454950/jabupefizazimapa.pdfIn PDF document text
    • https://cdn.sqhk.co/morureju/hihdMgf/19687276802.pdfIn PDF document text
    • https://gawujura.weebly.com/uploads/1/3/5/3/135325150/wabubefadeg.pdfIn PDF document text
    • https://jupuwova.weebly.com/uploads/1/3/1/4/131409597/659616.pdfIn PDF document text
    • https://cdn.sqhk.co/lojosexotak/7hhfiiT/sefibus.pdfIn PDF document text
    • https://cdn.sqhk.co/koletexun/cDcQmP5/11611957375.pdfIn PDF document text
    • https://jofowurifizowaj.weebly.com/uploads/1/3/4/6/134684387/aa28005.pdfIn PDF document text
    • https://mutikotamibe.weebly.com/uploads/1/3/0/8/130874320/1802156.pdfIn PDF document text
    • https://felelitujafi.weebly.com/uploads/1/3/5/3/135392562/vefesak.pdfIn PDF document text
    • https://cdn.sqhk.co/gusoguribus/Oujd7ha/gewazakajenasolu.pdfIn PDF document text
    • https://bexokafosirur.weebly.com/uploads/1/3/2/6/132695536/00e6ffa022.pdfIn PDF document text
    • https://cdn.sqhk.co/vurikede/hbQ3agc/talking_friends_apps_android.pdfIn PDF document text
    • https://cdn.sqhk.co/wimiwupo/ichf1ji/monster_jam_steel_titans_gameplay_fr.pdfIn PDF document text
    • https://cdn.sqhk.co/pesuxitum/sI3iaf2/that_s_life_mac_miller_sample.pdfIn PDF document text
    • https://cdn.sqhk.co/tirabipati/GJqNjix/steam_games_not_launching_2020.pdfIn PDF document text
    • http://jamosaxomexe.iblogger.org/best_blood_bowl_season_2_team.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://uploads.strikinglycdn.com/files/853ed11b-6f97-45d9-b4e2-040cb3191673/does_magic_mouse_2_work_with_windows.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c3c5409-64b3-4def-a14f-967593221d01/41486201054.pdfIn PDF document text
    • http://jatujij.rf.gd/percheron_artery.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf51716e-a95c-4fbd-96b7-2a76a1cf5b41/79940604749.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8029a315-2c0c-43a1-9c0d-1e1d4dc3b818/how_to_save_ms_project_2010_as_in_one_page.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_off0000fa5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA5C 4892 bytes
SHA-256: bd2415c45b2b38b53f33453165b073c117525c9d8db22647532ee91e59afb9d8
font_01_sfnt_off00010afb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFB 11400 bytes
SHA-256: e64ad70f9a05bc678db8e880ce37c6c37d7a11d414b7dbefc65fb04e0a60010e
font_02_sfnt_off000131c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131C9 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e