Malicious PDF — malware analysis report

Static analysis result for SHA-256 72a6804576a52593…

MALICIOUS

PDF

74.4 KB Created: 2021-03-03 21:36:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: ce348d9152d761ac1465c2965cae7933 SHA-1: 8414c5c6163b3c1f414004f23a737c7eaa492665 SHA-256: 72a6804576a52593047ff2333346373c54a3ce020e0ea7272861e17a6075e455
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=nba+apk+mod+offline In PDF document text
    • https://cdn.sqhk.co/zetanitanedo/Bhjdhji/mubedubedoz.pdfIn PDF document text
    • http://artemk.ru/past_simple_irregular_verbs_exercises_eslhp8yn.pdfIn PDF document text
    • http://dimax-matrasy.ru/how_do_i_find_my_sky_remote_code3b0or.pdfIn PDF document text
    • https://xidoxuzi.weebly.com/uploads/1/3/4/7/134707988/efbaf6abe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408170/normal_5feb50b970134.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414866/normal_60296f78dab8d.pdfIn PDF document text
    • https://vamawawu.weebly.com/uploads/1/3/0/8/130874524/saturusababigonomeza.pdfIn PDF document text
    • https://cdn.sqhk.co/bumogebiz/Uhhjhjd/air_control_2_premium_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/sabumijobude/diJghf0/kuxuwinobijim.pdfIn PDF document text
    • https://cdn.sqhk.co/xavexapoxiv/Zij4Agh/95675963050.pdfIn PDF document text
    • https://cdn.sqhk.co/dogilijesiwu/ehbJ0jc/16864883582.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxabofapuw/ichighi/yandex_disk_windows_download.pdfIn PDF document text
    • https://cdn.sqhk.co/xewasejeve/8LDJwje/22645649638.pdfIn PDF document text
    • https://simokatojerosu.weebly.com/uploads/1/3/0/8/130874490/xesojugaze_resavira_mijuzinofu.pdfIn PDF document text
    • https://cdn.sqhk.co/juvokapo/jiwii5n/rpg_offline_pc_games_list.pdfIn PDF document text
    • https://bapoxaluw.weebly.com/uploads/1/3/4/7/134717037/pewulumog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476954/normal_603d62734fb24.pdfIn PDF document text
    • http://kungfumalibu.com/adding_3_digit_numbers_using_partiti3dqs7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e8e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E3 5088 bytes
SHA-256: 5dd3b3c539928a4469a8bf704e3ddee1da419e57ef178dd231a38425eb462972
font_01_sfnt_off0000fa29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA29 10184 bytes
SHA-256: e9e34e102eb12098c2562579848fde16a085dc861c4ae7ddf171bf56dc355775

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