Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e80f87d2e6b8d0e…

MALICIOUS

PDF

69.8 KB Created: 2021-06-03 21:33:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0c8ebb22039bd4bdaa83816b9da30c8a SHA-1: af0b429378de6a111ddb96efb85de4b6d3dc612b SHA-256: 1e80f87d2e6b8d0e13e546e1761d7a72e5131227878261e661d80882dd495e32
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/123?utm_term=android+autocomplete+recyclerview PDF link annotation
    • https://nuwebobejope.weebly.com/uploads/1/3/1/4/131407692/72279a6e.pdfIn PDF document text
    • https://nabapobu.weebly.com/uploads/1/3/7/5/137501246/e1136.pdfIn PDF document text
    • https://duvozeja.weebly.com/uploads/1/3/0/7/130739152/7881724.pdfIn PDF document text
    • https://netodidomaxamoz.weebly.com/uploads/1/3/4/3/134311991/47bae4f48173.pdfIn PDF document text
    • https://lufapaxate.weebly.com/uploads/1/3/0/9/130969762/kifofulagojefonuxe.pdfIn PDF document text
    • https://valaxekujabe.weebly.com/uploads/1/3/4/6/134653377/soregedupajeg_mogukirodilejuv_vukovu_terotijinab.pdfIn PDF document text
    • https://fubibopiravi.weebly.com/uploads/1/3/0/7/130775748/godegovix.pdfIn PDF document text
    • https://wederubumojap.weebly.com/uploads/1/3/5/3/135393822/lufojikuj.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/c3d022bc-9649-4096-b433-9bb025d23224/67795078245.pdfIn PDF document text
    • http://werinenimuta.pbworks.com/w/file/fetch/144499422/1982_honda_nighthawk_450_carb_rebuild_kit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6da2bfd-3479-4af6-87e6-2751dd98145d/how_to_calculate_vif_in_stata.pdfIn PDF document text
    • http://wuxikadafi.pbworks.com/f/what_is_the_relationship_between_empirical_and_molecular_formula.pdfIn PDF document text
    • http://foxobekizax.pbworks.com/w/file/fetch/144436311/introduccion_a_la_microbiologia_tortora_12_edicion_descargar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f13c027-66f8-441e-8f52-befe0379f1df/votiwudoxa.pdfIn PDF document text
    • http://famukaser.pbworks.com/f/how_to_open_ge_stove_top.pdfIn PDF document text
    • http://vulazojab.pbworks.com/w/file/fetch/144546534/pro_warm_underfloor_heating_thermostat_manual.pdfIn PDF document text
    • http://muxopal.pbworks.com/w/file/fetch/144440442/seven_deadly_sins_prisoners_of_the_sky_full_movie.pdfIn PDF document text
    • http://zeladejan.pbworks.com/w/file/fetch/144442704/30436384955.pdfIn PDF document text
    • http://fotikeralo.pbworks.com/w/file/fetch/144571137/90768148879.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_off0000d0b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B6 5284 bytes
SHA-256: 5577c3c45e443dacd87b5126ad2f35d5e36088fd7ddfcb6e369cd273b9ba5d34
font_01_sfnt_off0000e2b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B0 11536 bytes
SHA-256: d4e03e2e39921aadbdbddd27528d54c65a9f1e4c106295f8e2605f1a6d413063

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