Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cda9e0ce92174d0…

MALICIOUS

PDF

79.8 KB Created: 2021-05-14 18:50:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 2418e88015fcf9d811d60aa4735a7a71 SHA-1: 5c73c2c51d0cb4613fbf98098d744f8fdd6b0ea8 SHA-256: 8cda9e0ce92174d0c8ae70b8c28d0f788847577509ea874e58a464dcbe43e0c0
246 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier. It functions as a link farm, containing numerous external links, many of which are hosted on disposable domains, suggesting a phishing or SEO manipulation scheme. The heuristic 'SE_SECRET_RECOVERY_LURE' indicates that the document may also attempt to trick users into revealing sensitive information like recovery phrases or private keys.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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=ford+mustang+mach+e+review+uk PDF link annotation
    • https://cdn.sqhk.co/fujavuraleko/ONOEEig/slim_pencil_christmas_tree_decorating_ideas.pdfIn PDF document text
    • https://cdn.sqhk.co/winelolibug/ojjzmtf/mini_soccer_multiplayer_games_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/potiribuwuf/iahcznx/94434914033.pdfIn PDF document text
    • https://cdn.sqhk.co/xiladuxe/heBjahg/21788800940.pdfIn PDF document text
    • https://sukaxivex.weebly.com/uploads/1/3/4/8/134895869/bezak-nolaxokokadege-tuzarewomoz.pdfIn PDF document text
    • https://cdn.sqhk.co/sezogitov/hbx2gcY/28329675585.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481289/normal_603ebbe0eafe8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502906/normal_5ff26b531e488.pdfIn PDF document text
    • https://cdn.sqhk.co/fufigavaki/iagjgjd/love_tester_game_online_free.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzaxepigi/jighghh/40242230903.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469375/normal_5ff577d71e038.pdfIn PDF document text
    • https://cdn.sqhk.co/noligigibar/fthbSif/25263894405.pdfIn PDF document text
    • https://moworanapubo.weebly.com/uploads/1/3/4/6/134685821/tesigepizaw.pdfIn PDF document text
    • https://cdn.sqhk.co/govibabika/SjgicqN/osmand_offline_travel_maps_navigation_v3._4._7.pdfIn PDF document text
    • https://cdn.sqhk.co/wogefosa/sigJfhi/sorililazivurevijoba.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://98771922-91e4-4673-aa0d-7794f4435593.filesusr.com/ugd/b6aaa0_56a7846d6d8545d2a1a9133f62da8a85.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c87b1e94-84af-42ed-9131-25b91f568693/stone_soup_company_delivery.pdfIn PDF document text
    • https://2b01876c-5741-4e94-bfb6-30973e4a6517.filesusr.com/ugd/45d688_0373b632e60c424aaee0e8de1c6a6145.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fd9656d-6b52-4792-8669-84ff2bb35dd2/dunkin_donuts_low_fat_iced_coffee.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d023f901-445d-4c47-85b4-2f154ea1c55d/what_episode_does_shippuden_start.pdfIn PDF document text
    • https://5f8b0e40-2141-4341-98ab-6145db4b8156.filesusr.com/ugd/2072cd_de4fdbcb2c4d432fb7e7d64fcec5187d.pdf?index=trueIn PDF document text
    • https://fdb0147f-387d-4908-9c93-1ccdb5bf775f.filesusr.com/ugd/aea2e0_ac70a772f7c641ef9b68ea9083f19a85.pdf?index=trueIn PDF document text
    • https://a32e93c2-1aa3-4149-af29-aa5d163ab988.filesusr.com/ugd/40336e_f1f903e710a94b0a9631e45219b27773.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/781f9b27-7fed-47ed-b8a4-16d246aca19c/saffire_pro_40_manual_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bb14831-b025-4f44-b850-976aa8e59f67/xamikeneserunavolariwar.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_off0000ebe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE5 5376 bytes
SHA-256: bdd03103cc238d8e161261277dac66ca0a2dfed0d3f23ab79f2f1a0846f1e436
font_01_sfnt_off0000fe0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0B 11148 bytes
SHA-256: a4a52cfc6bb490e5c4baf149fd997887172df87e9c8e03879ca5bd2e6ded866f
font_02_sfnt_off00012399.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12399 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3