Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe43fd05d8c7edc2…

MALICIOUS

PDF

76.8 KB Created: 2021-03-28 16:43:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 736056af72a8750baf58259d02740058 SHA-1: 525b2890d31497dbe9e562ab34068f9f6c90bef2 SHA-256: fe43fd05d8c7edc26bc60e41ceab91dba1067a50019dbfe62db753598dec8ef1
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 0.9991

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://xezojetit.ru/123?utm_term=2018+camry+hybrid+service+manual PDF link annotation
    • https://cdn.sqhk.co/xidosisew/dErgiig/mindustry_mods_github.pdfIn PDF document text
    • https://cdn.sqhk.co/minamojazi/gihdWjc/girozinizu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454807/normal_5fd164058cbe2.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/shKidzy/wudumoses.pdfIn PDF document text
    • https://cdn.sqhk.co/liminekaj/wJhhfic/word_quote_crossword_puzzle_game.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/zXhdIgj/papuzepajez.pdfIn PDF document text
    • https://cdn.sqhk.co/bikegola/7ijtTw2/cossacks_3_mac_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/ligumorik/ZSMRjff/18514962880.pdfIn PDF document text
    • http://wadopipojadali.iblogger.org/akcent_songs_pagalworld.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374374/normal_603d723897bce.pdfIn PDF document text
    • https://cdn.sqhk.co/mezadisedud/gdKMgfh/all_around_the_world_flags.pdfIn PDF document text
    • https://cdn.sqhk.co/wefadegese/hfVyHhe/game_of_thrones_beyond_the_wall_apk_obb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451039/normal_5fdab04d035bf.pdfIn PDF document text
    • http://pibalefiw.22web.org/fafisenew.pdfIn PDF document text
    • http://kipededevidabun.iblogger.org/can_i_use_5w30_oil_in_my_snowblower.pdfIn PDF document text
    • https://cdn.sqhk.co/rapawaferew/9q2bLOm/dining_room_furniture_near_me.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://robogotut.epizy.com/76900278258.pdfIn PDF document text
    • http://wigamezula.rf.gd/is_there_a_4th_how_to_train_your_dragon.pdfIn PDF document text
    • https://34570882-574e-4d25-8c0e-d8b9b6c2967f.filesusr.com/ugd/cb2bed_279307025cb6452595d20f1744157759.pdf?index=trueIn PDF document text
    • https://c84d532c-3b33-47d6-96aa-4134a1164eb1.filesusr.com/ugd/6d45f6_01f16e3b487945ca807cfcac10ed0071.pdf?index=trueIn PDF document text
    • https://5405d108-7f1e-482b-a10c-e06f62b7505d.filesusr.com/ugd/d941b1_ecce1f77815a4ebca264ff293f56bd94.pdf?index=trueIn PDF document text
    • https://937a8a2d-b41a-4163-aff8-eda6db263557.filesusr.com/ugd/21e6f2_51405ea4d2344a4597a2fb3982d43bd6.pdf?index=trueIn PDF document text
    • https://98e80eac-0673-4bf9-a3de-4132461903b3.filesusr.com/ugd/1acd69_00426131328c4053936a9c4daf2a1967.pdf?index=trueIn PDF document text
    • https://50c84cdf-c8d4-407e-a307-361b94491100.filesusr.com/ugd/f2656e_ddb110539d49484290d58a91d3307a39.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3A 5908 bytes
SHA-256: 58778aa916a6e2634415dd7e4e6a5a6fc3a6f4d1441185a8edf354551fe4fee2
font_01_sfnt_off00010031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10031 11104 bytes
SHA-256: 14657e251e055bf1d0c17998d1bad4fc6d3508615016f3e2906a909e025facb1