Malicious PDF — malware analysis report

Static analysis result for SHA-256 8adcd4b0f082eed0…

MALICIOUS

PDF

82.2 KB Created: 2021-03-28 09:45:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f00b827d1030a1d0e6a68c2bdd4be33d SHA-1: 701098a8263dd224b4c6eea0c48205358a075d02 SHA-256: 8adcd4b0f082eed05c9d8f86dd5dd6654721759fa6b3e7948450c23a29650bca
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary suspicious URL pointing to 'ponafet.ru'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a large number of links on disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or delivering a secondary payload.

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://ponafet.ru/strik?utm_term=what+are+the+symbols+in+dr+heidegger%2527s+experiment PDF link annotation
    • https://sibomimotilelib.weebly.com/uploads/1/3/4/2/134235458/daderexajugoputukeke.pdfIn PDF document text
    • http://zilitimo.getenjoyment.net/allahabad_state_university_ba_time_table_2020_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwonesi/fhjhahf/rawox.pdfIn PDF document text
    • http://nefupanono.mygamesonline.org/luwow.pdfIn PDF document text
    • https://cdn.sqhk.co/gobisofokox/giiaidA/6169615943.pdfIn PDF document text
    • https://cdn.sqhk.co/mifigatira/cwI60kO/snes9x_controller_config.pdfIn PDF document text
    • http://dudoxanudito.scienceontheweb.net/kanipunodabexog.pdfIn PDF document text
    • http://tuvivukaroj.mygamesonline.org/jidevupevunewofebuk.pdfIn PDF document text
    • https://dudunubute.weebly.com/uploads/1/3/4/1/134132035/b559f.pdfIn PDF document text
    • http://tunewejewuz.mypressonline.com/50359440159.pdfIn PDF document text
    • https://cdn.sqhk.co/pitewomepe/hljbPgi/15891707066.pdfIn PDF document text
    • http://mokemowowove.mygamesonline.org/add_and_subtract_integers_word_problems.pdfIn PDF document text
    • http://bimoriz.getenjoyment.net/vonimuwoxuvatelivufukijuv.pdfIn PDF document text
    • https://gilurabad.weebly.com/uploads/1/3/0/7/130775641/3490956.pdfIn PDF document text
    • http://bapatavusirave.mygamesonline.org/best_lg_front_load_washer_and_dryer_set.pdfIn PDF document text
    • http://janipuwibir.mywebcommunity.org/18397073393.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/patotale/93560022505.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/73053706792.pdfIn PDF document text
    • http://polabufu.myartsonline.com/occupational_health_and_safety_books.pdfIn PDF document text
    • https://s3.amazonaws.com/saziwijaxodav/10143887701.pdfIn PDF document text
    • http://xowobovu.myartsonline.com/rufamaxojofofopise.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/greeting_in_formal_letter_sample.pdfIn PDF document text
    • http://xoxekojut.onlinewebshop.net/sesevumoto.pdfIn PDF document text
    • http://pedirite.onlinewebshop.net/murikumurojopu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000101b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B1 5728 bytes
SHA-256: efd854f997e37b718f1c31e1a8182c74bc7731aa974f2a980995092ae2f4c078
font_01_sfnt_off0001151f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1151F 10380 bytes
SHA-256: 57f593f834e0f411a6533f3b9a6856457d91bfa5b220f337f227c269e33ba26f

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