Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5595070d4408630…

MALICIOUS

PDF

76.1 KB Created: 2021-03-04 04:01:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: c97036e0376aee9fde5b7a62bb1d662d SHA-1: 55316ef64879bb42e5eff75e4c4416b410e79e46 SHA-256: f5595070d44086305457cf3b3bea68ff0d5e9dd1a9edccfd836160ab93811d75
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, specifically as a phishing trojan. It contains numerous embedded URLs, with at least one pointing to a suspicious domain ('ponafet.ru') and another to a link farm ('iblogger.org'), suggesting an attempt to redirect users to malicious content. The document body, though partially corrupted, contains a title related to 'how to do half life problems with percents', which is likely a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/123?utm_term=how+to+do+half+life+problems+with+percents PDF link annotation
    • http://sulogajifuv.iblogger.org/gezurugowebupimifej.pdfIn PDF document text
    • https://cdn.sqhk.co/nemazuwigumo/4hfFRHk/movie_collection_app_for_pc_download.pdfIn PDF document text
    • http://mini-cam2.club/bozezozabadakrvhns.pdfIn PDF document text
    • http://tijudozi.scienceontheweb.net/hp_deskjet_2546r_wifi_setup.pdfIn PDF document text
    • http://ouily.xyz/58326135740059d1.pdfIn PDF document text
    • http://najisemure.medianewsonline.com/curso_bsico_de_ingls_para_adultos.pdfIn PDF document text
    • http://rmk4sale.xyz/32691795431tdqd3.pdfIn PDF document text
    • http://vonexalux.sportsontheweb.net/what_causes_a_dryer_to_run_but_not_heat.pdfIn PDF document text
    • http://mozaduz.mygamesonline.org/shadowrun_3rd_edition_cyberware_list.pdfIn PDF document text
    • https://cdn.sqhk.co/jenojigise/e2idhbG/sea_battle_world_app.pdfIn PDF document text
    • http://zexaribamemavi.sportsontheweb.net/netgear_powerline_1200__extra_outlet_adapter.pdfIn PDF document text
    • http://prizinsta.info/know_why_you_believe_paul_little_freept5nc.pdfIn PDF document text
    • http://bitalotava.scienceontheweb.net/didowanibemalaxivebagi.pdfIn PDF document text
    • http://kedugobepuged.mywebcommunity.org/47737154490.pdfIn PDF document text
    • http://xtreme-sport.ru/seth_klarman_letterrv0p8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://felepav.epizy.com/16173510172.pdfIn PDF document text
    • http://nukivamo.myartsonline.com/11899304300.pdfIn PDF document text
    • http://lawewil.atwebpages.com/canoscan_lide_210_software_download.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_off0000e8a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8A3 5588 bytes
SHA-256: d7a07e8ab0a900b11d72e3f28577f8575fa19395f6059b129e1901eadb7019e1
font_01_sfnt_off0000fb85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB85 11480 bytes
SHA-256: da7e501efd3c15233edfdb98ad1c80b08521e98090257799fe45f586e0b53159

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