Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6564598ec8082b7…

MALICIOUS

PDF

73.5 KB Created: 2021-02-18 08:43:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 8f12b6aaa0c46dcdb3661a80e2891205 SHA-1: 7f442bd44788e2802942a704624f72decd0376e0 SHA-256: b6564598ec8082b7fc54cc73750578a4abb72964a502072ef799c2daea4b12ff
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. ClamAV identified this as a phishing trojan. The presence of embedded URLs and the nature of the heuristics strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://druttle.ru/wb?keyword=asus%20x205t%20battery%20replacement PDF link annotation
    • https://cdn.sqhk.co/xogudililavo/hHOGfeu/41735233069.pdfIn PDF document text
    • https://cdn.sqhk.co/nefakovuwot/Jztiaif/clash_of_clans_th12_attack_strategy_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/fukefipemuw/iidjaem/missiles_in_cuba_problem.pdfIn PDF document text
    • https://cdn.sqhk.co/satijumok/Aggvkgh/gogubapizoroxeloxadivekox.pdfIn PDF document text
    • https://kekugijofer.weebly.com/uploads/1/3/5/3/135321092/3d315e2acad93.pdfIn PDF document text
    • https://wexasubofuxumeb.weebly.com/uploads/1/3/2/7/132740188/degobamufetanivusepi.pdfIn PDF document text
    • https://pidedofafotego.weebly.com/uploads/1/3/1/4/131438241/bc7612b18.pdfIn PDF document text
    • https://nisaxiguxizi.weebly.com/uploads/1/3/5/3/135306566/633cdc1effd.pdfIn PDF document text
    • https://cdn.sqhk.co/sesexibanobu/ifjhieE/wedding_dress_up_games_poki.pdfIn PDF document text
    • https://cdn.sqhk.co/nivodoruw/kEhiXjc/25902774018.pdfIn PDF document text
    • https://bovakexigi.weebly.com/uploads/1/3/5/3/135314068/5254185.pdfIn PDF document text
    • https://cdn.sqhk.co/bexoninodag/VijKihk/bazuwizutesefi.pdfIn PDF document text
    • http://dujalubudekir.22web.org/video_editor_for_android_4._0.pdfIn PDF document text
    • https://cdn.sqhk.co/savaketiju/kTgg5iZ/the_spot_events_activities_for_preschool.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/julexekubaj/padimisuvugodaxorivexuje.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/doris_day_que_sera_sera_sheet_music.pdfIn PDF document text
    • http://guzaxugevogifu.epizy.com/95548371964.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/basic_geometry_constructions_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/how_to_answer_task_1_ielts.pdfIn PDF document text
    • http://xonafalapon.epizy.com/karaoke_cinta_luar_biasa_mp4.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C6 5776 bytes
SHA-256: e569e461fdbb4abc673d637d3f99516c9574f7949a3657759800999b3a3eabb7
font_01_sfnt_off0000f469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF469 10540 bytes
SHA-256: c5846c5709d22f83f2ca3e059ca31263bc45731ba4e33cf672b0e94123910d7d

Open this report in the interactive analyzer, or submit your own file for analysis.