Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b8817c42ad9f8d3…

MALICIOUS

PDF

77.0 KB Created: 2021-04-08 13:42:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: c4fcf83442ab4c4d0cccda41a918b6cb SHA-1: ef854bfe7292c9850aeb2d0e5e0c4a6cb8b1d99b SHA-256: 9b8817c42ad9f8d37dbab7ad81ab066d97a5ab660663094a531597550116d6cf
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one prominent URL pointing to 'ponafet.ru', suggesting a redirection to a malicious site. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document's structure is designed to host many links, reinforcing the idea of a lure or distribution point.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=do+car+ionic+air+purifiers+work PDF link annotation
    • https://tasusigogifu.weebly.com/uploads/1/3/5/3/135303518/92a34122cf3c2.pdfIn PDF document text
    • http://mediaverifiedbadge.com/pentax_p30_manual6jq7p.pdfIn PDF document text
    • https://mimevomakiket.weebly.com/uploads/1/3/4/6/134693464/lomit_fedisos_tovonigixulixux.pdfIn PDF document text
    • https://fegikunula.weebly.com/uploads/1/3/4/4/134482285/5318481.pdfIn PDF document text
    • http://meetsalle.xyz/44766026066ej20h.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374851/normal_6037f1e33de31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369760/normal_604198cc2bce1.pdfIn PDF document text
    • https://doxefifuz.weebly.com/uploads/1/3/0/9/130969363/fezavakade.pdfIn PDF document text
    • https://dukuvelawabuze.weebly.com/uploads/1/3/0/9/130969723/muxida.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459329/normal_604a0187439c6.pdfIn PDF document text
    • http://grenkasalo4.xyz/26178198578lg1t0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494436/normal_601d95d5c5eae.pdfIn PDF document text
    • http://thehensleys.org/how_to_relieve_plantar_fasciitis_pain_in_heelr6gx9.pdfIn PDF document text
    • http://betogav.22web.org/74855262953.pdfIn PDF document text
    • https://mizugoveram.weebly.com/uploads/1/3/3/9/133986338/lisikunemez.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393508/normal_5fe3402b27702.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/79c43f82-d4f5-426f-b05c-53dfffc305f4/batman_the_killing_joke_final_joke_explained.pdfIn PDF document text
    • http://gupiwozekozib.rf.gd/reset_chamberlain_klik2u_clicker_keypad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d689376-2cc2-4e54-8877-972507dbdf8f/monkey_business_used_in_a_sentence.pdfIn PDF document text
    • http://zuwitemozu.epizy.com/rozosenonasikabixa.pdfIn PDF document text
    • http://xupuwineris.epizy.com/bihure_logon_bengali_song.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15412d79-69df-4036-8dc9-611941b26900/how_to_clean_a_presto_non_stick_griddle.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_off0000efee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFEE 5132 bytes
SHA-256: e0b25dc57574901c402d484faeeb9ac2d7d3987c76e0c622abfecac66f7b0815
font_01_sfnt_off00010195.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10195 10816 bytes
SHA-256: 87da224b88a40577dc94d311661e2ebd6d27b4d7265e54024d0a5302371e39e6

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