Malicious PDF — malware analysis report

Static analysis result for SHA-256 c22d93459ac3c6e8…

MALICIOUS

PDF

91.8 KB Created: 2021-03-09 05:42:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6e4744a496871bf10337d740804751d0 SHA-1: aeb1695901abe7bfac7e9450ac4a0a70102a9f3a SHA-256: c22d93459ac3c6e8a859952951545deeb3a5cfac688c38c597ed373cf7ed63e4
126 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains or potentially malicious content, as indicated by the 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were explicitly extracted, the nature of the links suggests an attempt to redirect users to malicious sites or distribute further malware, aligning with common phishing or SEO spam tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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
  • 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://jottigo.ru/wix?keyword=will+airbag+light+fail+inspection+in+nc PDF link annotation
    • http://azules.ru/theta_healing_practitioners_melbournelpjwy.pdfIn PDF document text
    • https://zikowajemaje.weebly.com/uploads/1/3/1/6/131607239/dowazebokanimad.pdfIn PDF document text
    • https://kazowotamije.weebly.com/uploads/1/3/4/0/134012594/769299.pdfIn PDF document text
    • https://zidoboxeped.weebly.com/uploads/1/3/5/3/135324118/e77c501b7999f.pdfIn PDF document text
    • https://cdn.sqhk.co/wuwexosul/eEiNfjc/rugisidejop.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzinipaz/hicAhgD/gatibotudoxufukabutugo.pdfIn PDF document text
    • http://cardioactiveufficiale.site/why_are_all_the_lights_flashing_on_my_epson_printerohnab.pdfIn PDF document text
    • https://dabagurujor.weebly.com/uploads/1/3/4/3/134350609/d5ef4a01e.pdfIn PDF document text
    • http://pivolirarorip.mypressonline.com/como_agua_para_chocolate_laura_esquivel_english_translation.pdfIn PDF document text
    • http://legendarycraft.ru/koxaregavisopemenabudba1bo.pdfIn PDF document text
    • https://nitikado.weebly.com/uploads/1/3/4/6/134660078/novatuxavu.pdfIn PDF document text
    • https://kumumejetosen.weebly.com/uploads/1/3/0/9/130969188/d6d23461537.pdfIn PDF document text
    • https://lokudepapina.weebly.com/uploads/1/3/5/3/135325929/4723406.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/859db509-2c0c-4e6d-a018-7d129240d0ee/44778714652.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f05604b-6284-447c-a60c-9f035eb85954/wobuzo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0177761-3780-4128-ae9d-81b4186d79be/48823871083.pdfIn PDF document text
    • http://gozidonozali.myartsonline.com/sabumogotizamuwep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d482f260-bca1-48bd-83ca-4f53bd19d702/a_monster_in_paris_la_seine_cabaret_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/976a0223-58c3-4503-a6f5-e37a74bdeed4/54769894995.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_off00012a68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A68 5432 bytes
SHA-256: d5f8c83c73a3e3ad17f1f290ad5cedb2e0412766549a057c0a56ce976cc992c0
font_01_sfnt_off00013cec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CEC 10872 bytes
SHA-256: 6d39c77c2b483dc7c1d8dd96bb37991fd343c6f6e301f9bf714752de05b824ec

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