Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ddcab57d71fdea2…

MALICIOUS

PDF

70.1 KB Created: 2021-03-10 12:19:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: dcfaa4d174156e038bcdd267afd20a4e SHA-1: 50a87a98588f2146ec097a526b7299c642c3f390 SHA-256: 2ddcab57d71fdea288737602313d67aa250d8841777ec0900015ba171b89ef80
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant portion pointing to disposable hosting and exhibiting link farm characteristics. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were extracted, the PDF structure and URL analysis suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://zajinet.ru/strik?utm_term=slingbox+m2+power+supply PDF link annotation
    • http://telovajov.medianewsonline.com/sportdog_collar_not_responding.pdfIn PDF document text
    • http://vasizazesunof.medianewsonline.com/49718795385.pdfIn PDF document text
    • https://cdn.sqhk.co/silonifer/5zhfKgf/56683448707.pdfIn PDF document text
    • http://exemplpusj.com/brevet_maths_2019_pondichery5fff4.pdfIn PDF document text
    • http://fagixadako.iblogger.org/pizukanowiwonavip.pdfIn PDF document text
    • http://ketousa.site/additive_white_gaussian_noise_matlabi9xc0.pdfIn PDF document text
    • http://komamoj.22web.org/kugoxidoboxumovokisa.pdfIn PDF document text
    • http://jakufodunod.getenjoyment.net/new_england_beef_farms.pdfIn PDF document text
    • http://goldotzyv.ru/33018147173j5mg3.pdfIn PDF document text
    • http://tosety.xyz/69715709514mf5ln.pdfIn PDF document text
    • https://cdn.sqhk.co/pozedezupase/ciekGkm/war_card_game_6_players.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jatokipukaku.epizy.com/guess_the_pic_answers_level_71.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d82979ca-2ac7-4355-a357-3ba4eb63976e/are_non_continuous_functions_differentiable.pdfIn PDF document text
    • http://faxevimisosideg.myartsonline.com/toro_sprinkler_system_wiring_diagram.pdfIn PDF document text
    • http://lufubapiworozil.epizy.com/xinizulika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e693152-936c-41eb-9541-de8f4ffcac64/fukeravapuwulekufe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df371442-197f-4a2c-b254-5384502010ab/my_son_the_fanatic_analysis.pdfIn PDF document text
    • http://sabiwilurase.atwebpages.com/air_force_1_black_white_and_grey_high_top.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e46eb1e-9360-460a-b78f-7d8285199c7e/how_does_11_22_63_end.pdfIn PDF document text
    • http://felepav.epizy.com/bread_and_butter_letter_format.pdfIn PDF document text
    • http://kalapifupedafog.epizy.com/xobipugefezajuzeg.pdfIn PDF document text
    • http://wagadepepixapu.epizy.com/65188854745.pdfIn PDF document text
    • http://vofofoduwegakuv.rf.gd/34607656104.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_off0000d3ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3BA 5564 bytes
SHA-256: fa9263978d03df11a8d8b1936f4a0306e687d9ac54864c0ba15ab068362023fb
font_01_sfnt_off0000e6aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6AA 10788 bytes
SHA-256: d5cc954fc70d72ba9750106f29021805bacce186bfa91a5758d9100b39efdb94

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