Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bf5f2c8d0673dc4…

MALICIOUS

PDF

86.7 KB Created: 2021-05-09 07:30:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: d9d0a3cbb963ca3c77dfb38aac261abc SHA-1: 2d9d54d6cab281ffb4ba8c1cedb03a2924d9c311 SHA-256: 0bf5f2c8d0673dc4ef0ee68e351b3de458bb542e65c30ac8e0e6ebb2f4c6bc58
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://fokemale.ru/strik?utm_term=ruger+mini+14+vs+30+carbine PDF link annotation
    • https://cdn.sqhk.co/soziwariru/j0F4PQb/really_make_virtually_create_pottery_ceramic_artists.pdfIn PDF document text
    • http://vimobewawulipiz.mypressonline.com/how_to_shut_off_ice_maker_on_frigidaire_gallery.pdfIn PDF document text
    • https://cdn.sqhk.co/zezetemirag/gjgjheX/my_little_pony_rainbow_runners_app.pdfIn PDF document text
    • https://cdn.sqhk.co/sugezigo/bgc6S9D/tiktok_viral_video_cranberry_juice.pdfIn PDF document text
    • http://astrology-personal.online/batifebplfkc.pdfIn PDF document text
    • http://alkostore.xyz/sirefojinifofamekexamj5cbr.pdfIn PDF document text
    • http://dithetsen.xyz/kuxebixofugwz7ba.pdfIn PDF document text
    • http://kefets.xyz/25094245541ufd6v.pdfIn PDF document text
    • http://mopowataxix.medianewsonline.com/powegu.pdfIn PDF document text
    • http://trysucre.pro/37331994203y2hl3.pdfIn PDF document text
    • http://spacexfoundation.net/explain_the_three_main_differences_between_dna_and_rnahlwvc.pdfIn PDF document text
    • http://khanapoorti.com/bumubefezdn0te.pdfIn PDF document text
    • http://doctora.club/triple_bottom_line_adalah3gvd3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://noxoposuxasife.rf.gd/piriformis_muscle_ultrasound.pdfIn PDF document text
    • https://27420876-d215-4860-9a72-f48db0d0c320.filesusr.com/ugd/4062c2_3315902852f64996a3583a120b1b677e.pdf?index=trueIn PDF document text
    • http://zunufofidufup.rf.gd/demote.pdfIn PDF document text
    • https://dd6f0c70-611b-430f-b219-ee0593fd0e1f.filesusr.com/ugd/d60051_e8d73476d5fd48e58a30498fa706e6f6.pdf?index=trueIn PDF document text
    • http://punotonaduwize.atwebpages.com/fafuwiwamikakideroni.pdfIn PDF document text
    • http://titizobilane.epizy.com/rapufodiv.pdfIn PDF document text
    • http://jofesosozofoso.epizy.com/75091597886.pdfIn PDF document text
    • http://gelisufaw.rf.gd/www._online_converter_to_excel.pdfIn PDF document text
    • https://3778afa4-e5d9-4bb6-be54-d343c89b577b.filesusr.com/ugd/11c894_9df0cd8f92974fa086a7bcb122953802.pdf?index=trueIn PDF document text
    • https://901c4554-6fda-40bf-8344-1f1538f5dc06.filesusr.com/ugd/a76634_a4fd77b9fea74a12a723db7d2f4b9763.pdf?index=trueIn PDF document text
    • http://jopubijako.atwebpages.com/getixoretuvuwisex.pdfIn PDF document text
    • http://wesatume.atwebpages.com/8160400650.pdfIn PDF document text
    • https://300a1258-3b13-45f7-80b9-bd8966f45320.filesusr.com/ugd/81888a_e252785ea13d4339896702428545fd48.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_off0001158e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1158E 5740 bytes
SHA-256: 5f7d777be5d4662662f4401318f1344528d581a50cfe92e68d6875b4213e7140
font_01_sfnt_off00012919.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12919 10468 bytes
SHA-256: dac3f08c17d6d92e44d8159a26618a0efee40646f976c5dd789d9aca3bd0debd

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