Malicious PDF — malware analysis report

Static analysis result for SHA-256 48b39ed546d3c0f4…

MALICIOUS

PDF

87.0 KB Created: 2021-05-15 18:08:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 596d793b2ee46662c891bd24dae81a61 SHA-1: c79056da7651152ea5e8fd8df38184328aceb119 SHA-256: 48b39ed546d3c0f4a22b58de517abe125e6eb1f281eae2b70b1ad08953ffc21e
184 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV and an ML classifier as malicious. It contains a high number of embedded URLs, many pointing to disposable domains, and one specifically to known malicious redirector infrastructure. This indicates a likely phishing or scam campaign designed to lure users to malicious sites.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/strik?utm_term=kenneth+e+hagin+god%2527s+medicine+youtube In PDF document text
    • https://cdn.sqhk.co/dubutemaruxu/Uicib9O/fifth_edition_character_sheet_json_files_gunslinger.pdfIn PDF document text
    • http://pazujiz.mygamesonline.org/present_perfect_tense_with_already_and_yet.pdfIn PDF document text
    • http://mawosatejojeka.sportsontheweb.net/9857825685.pdfIn PDF document text
    • http://1fps.ru/933647332158call.pdfIn PDF document text
    • http://raponikidosal.getenjoyment.net/safidajaze.pdfIn PDF document text
    • http://goproits.com/14305494248na9o0.pdfIn PDF document text
    • https://cdn.sqhk.co/novitovikor/ghcgcgh/portal_knights_2.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://allwoman.site/radioterapia_como_funcionapalp7.pdfIn PDF document text
    • http://helplnstagramcontact6088758.com/78041801244gtk4h.pdfIn PDF document text
    • http://serdyukov.pro/712448617849ql59.pdfIn PDF document text
    • http://counterman.ru/kinetico_premier_compact_water_softener_reviewz6526.pdfIn PDF document text
    • http://nemosixumeki.mypressonline.com/galaxy_buds_user_manual.pdfIn PDF document text
    • http://laluwaraselolar.mywebcommunity.org/vertebrate_zoology_notes.pdfIn PDF document text
    • https://cdn.sqhk.co/norowitidot/icQhbBk/zagisegitisufowo.pdfIn PDF document text
    • http://hayatevesigar.online/kogovujatimevewuralep5494.pdfIn PDF document text
    • http://hot-money.fun/girl_jamaica_kincaid_storybrzps.pdfIn PDF document text
    • http://fotonagosuslugi-01.space/lifetime_movie_club_app5o1wb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8eb0ff2f-1b5f-41fb-a82b-bf279dc7f43e.filesusr.com/ugd/868f76_c1fe3f2e77624eab9394d1e3925ea90b.pdf?index=trueIn PDF document text
    • https://a943cdc4-551e-4fd6-8842-bb1c82e441e2.filesusr.com/ugd/a0303e_4cc0b57d6db0494099ef4f9bdadcc91e.pdf?index=trueIn PDF document text
    • https://bf130ee1-1463-4c69-9604-1b23772ced92.filesusr.com/ugd/b4609a_488381dca07d4be6b526c6120c3bdc7a.pdf?index=trueIn PDF document text
    • https://35548484-ce42-4b18-9d9d-834326683263.filesusr.com/ugd/a221b6_5ea7b30e6f7443b7ab7ce66a7cdcab96.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

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_off000116ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116EA 5472 bytes
SHA-256: 90f8e0e02d2bd4fea845dc352c144efb300e161498b440c9f4e6a1d869e44678
font_01_sfnt_off0001297b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1297B 10608 bytes
SHA-256: a245d8e5943b040e29e1fbe24032849cf065447aeff05c2f304c270fec1fb23e

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