Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a92e4340f3930af…

MALICIOUS

PDF

74.6 KB Created: 2021-03-13 22:11:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: bc11c0645c8b5d422a5acb04bccf8973 SHA-1: 2bfc7608fa8d45e5c8f4858942dd71ef209b3370 SHA-256: 2a92e4340f3930af065713f704a5fe4b5fb9af9de5f06b52565549227c107f07
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of numerous embedded URLs, many pointing to disposable or suspicious domains, suggests a phishing or malware distribution campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates a link farm on disposable hosting, reinforcing the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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://vilenefex.ru/strik?utm_term=university+of+texas+zip+code+austin PDF link annotation
    • http://modutomipofa.iblogger.org/flutter_template_free.pdfIn PDF document text
    • https://cdn.sqhk.co/ripalufix/DzyjgiI/45439434402.pdfIn PDF document text
    • https://cdn.sqhk.co/zegofurop/fhiAwXg/aaru_movie_songs_isaimini.pdfIn PDF document text
    • https://lapidarofo.weebly.com/uploads/1/3/0/8/130874394/siduwetobefat.pdfIn PDF document text
    • https://jomimufigaz.weebly.com/uploads/1/3/4/3/134319247/e90862e.pdfIn PDF document text
    • https://cdn.sqhk.co/gupuwiwi/hcVijhe/box_office_mojo_2020_movie_releases.pdfIn PDF document text
    • https://sinipipa.weebly.com/uploads/1/3/0/8/130874509/a8807f71ce.pdfIn PDF document text
    • https://cdn.sqhk.co/tezabulaw/jgjihig/42125700350.pdfIn PDF document text
    • http://gagigijaloj.22web.org/sexetoxon.pdfIn PDF document text
    • https://cdn.sqhk.co/nebemina/K2sFicY/free_wallpapers_to_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/de7d1ab7-ab56-4872-a35b-4fe33cbd031b/accu_chek_aviva_expert_manual_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/92fd2710-7172-4f4b-b250-338bfe9f235a/o_poder_da_esposa_que_ora.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/jikasijemed.pdfIn PDF document text
    • http://judixipe.epizy.com/cisco_cp-8841_headset_adapter.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/88735235548.pdfIn PDF document text
    • http://bunokupisosep.epizy.com/13062109684.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21d23b5a-6451-4646-9d42-1859365591ed/49116553243.pdfIn PDF document text
    • http://vevofiwimim.epizy.com/sony_dvd_rmt-d197a_remote_codes_for_panasonic_tv.pdfIn PDF document text
    • http://rugunazivesix.rf.gd/bachelor_pad_economics.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/whatsapp_status_for_chocolate_lovers_video.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/50036393663.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d03e35a-bf67-4b5b-b197-f6e79a411efc/irobot_roomba_870_manual.pdfIn PDF document text
    • http://pazixurofuni.epizy.com/supotoku.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/kijuzawafo.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_off0000e47e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47E 5388 bytes
SHA-256: 3c404b8eeea81a90c1a76d0ca59713cf1131977b97f691c5c8fbeedced22691b
font_01_sfnt_off0000f700.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF700 11376 bytes
SHA-256: 6a03c1c83e567548e18d6e66db1f1fc97d56d4507d41b7508096bec68dfac665