Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f550fa286233728…

MALICIOUS

PDF

63.5 KB Created: 2021-03-12 09:45:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 392e837e47567d6409d3a9803bb0806d SHA-1: fb74d9de2d66c78b2ea39402aba00d7abcaa13d1 SHA-256: 4f550fa2862337282a5edeb630ac2f85be4ebbd094a4f355816dc928e996e291
184 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of techniques used to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8501

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 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://mezovuduw.ru/strik?utm_term=c.s.+lewis+mere+christianity+audio PDF link annotation
    • https://cdn.sqhk.co/puvivefujef/hjhdDig/40467290717.pdfIn PDF document text
    • https://cdn.sqhk.co/giwibilawa/iiji8ic/kung_fu_tea_delivery_nyc.pdfIn PDF document text
    • https://cdn.sqhk.co/karapazepot/jd1ifib/the_world_of_magic_leveling_guide_ranger.pdfIn PDF document text
    • http://zubosoxi.22web.org/fundamentos_de_algebra_lineal_larson_6_edicion.pdfIn PDF document text
    • https://cdn.sqhk.co/wogokodu/bedgigf/mad_truck_challenge_racing_mod_apk.pdfIn PDF document text
    • http://fosukimiten.22web.org/samsung_ak59-0149a_remote_codes.pdfIn PDF document text
    • http://bowoporoj.iblogger.org/lopurobuledijakinake.pdfIn PDF document text
    • https://cdn.sqhk.co/buwaxaxodi/jdhbhiJ/secret_of_mana_2018_soundtrack_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ea74ff18-003d-4094-8454-8d7e15e33abb.filesusr.com/ugd/50de67_e8fc4a44ceaa47459d663179bbf4011b.pdf?index=trueIn PDF document text
    • http://fofanab.epizy.com/24813753713.pdfIn PDF document text
    • https://a121017b-3fb3-450c-9156-48dd71a9bf80.filesusr.com/ugd/07625c_c29214ba460a482b903d445106b7e152.pdf?index=trueIn PDF document text
    • https://d52369c8-37f2-40d9-9d5f-d682b3b4a2e4.filesusr.com/ugd/6d5a7b_03ae95d0861b43df92be9a5863c135de.pdf?index=trueIn PDF document text
    • https://bcd7deca-fd5d-492b-a220-d373ca515bc9.filesusr.com/ugd/12f4eb_08983ab713e94e77a353575584864a31.pdf?index=trueIn PDF document text
    • http://poxemibusap.epizy.com/how_do_you_wear_a_mask_without_steaming_up_your_glasses.pdfIn PDF document text
    • http://jodewejuwuw.epizy.com/joxetexudurojibifulum.pdfIn PDF document text
    • https://b7af6bb9-01eb-4839-ab56-764651de4344.filesusr.com/ugd/2486b5_621421b33d974f86bac09b27bde6d565.pdf?index=trueIn PDF document text
    • http://rodobokojezaga.epizy.com/lufenirovefikagimuregaj.pdfIn PDF document text
    • http://sakikuzugodo.rf.gd/sezagosegolubamujoritevo.pdfIn PDF document text
    • https://9387bd13-3746-4408-b474-2867f26e464d.filesusr.com/ugd/ace02d_84499b7944fa43358c2d365fa773c998.pdf?index=trueIn PDF document text
    • https://1f49b3f1-4b09-4f89-88df-03804352fc9a.filesusr.com/ugd/a51aec_f9723fb88c28411b9e2d3b0b53773686.pdf?index=trueIn PDF document text
    • https://20128683-61eb-4207-b985-d468b1a81fea.filesusr.com/ugd/0049ca_501e1705fd3f4c7dbc4e63602abcfd34.pdf?index=trueIn PDF document text
    • http://bowomufe.epizy.com/note_20_plus_price_in_south_africa.pdfIn PDF document text
    • https://626fb5af-1d67-41cb-86ce-204163677ff0.filesusr.com/ugd/9d869b_a42da01b09e24850a418b7543d9662d0.pdf?index=trueIn PDF document text
    • http://pugupokevimukov.epizy.com/active_and_passive_voice_past_tense_worksheets.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD041 5312 bytes
SHA-256: 19ba7ef81c60fe13ea2902750999e0d47539cdee281c176470f460f9a166ba19

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