Malicious PDF — malware analysis report

Static analysis result for SHA-256 edac775b1b6edfd5…

MALICIOUS

PDF

102.6 KB Created: 2021-03-17 16:17:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e9f3bb22bdf6c56a3e210835e376976c SHA-1: c3a3b1efe99493cb337826848f8a19ab52f44b8c SHA-256: edac775b1b6edfd594d626c4e5aa910ae6f0a9bbbeb60226ce1acd3d14758e8c
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 6

  • 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 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://baarspo.ru/wix?keyword=wiki+blue+bloods PDF link annotation
    • https://vewosofi.weebly.com/uploads/1/3/4/4/134493368/xotumok.pdfIn PDF document text
    • http://instapodarok.site/privilege_power_and_difference_2nd_edition6po7y.pdfIn PDF document text
    • https://zujomesesewega.weebly.com/uploads/1/3/4/9/134902804/toloki.pdfIn PDF document text
    • https://zojubexetiw.weebly.com/uploads/1/3/5/3/135316795/kizononerudaka.pdfIn PDF document text
    • https://jodisugej.weebly.com/uploads/1/3/4/7/134732418/xeligunutesadon.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484997/normal_60519e5e0cfef.pdfIn PDF document text
    • https://nudilosi.weebly.com/uploads/1/3/4/5/134527742/suwipikidawupi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454984/normal_604fca0f14834.pdfIn PDF document text
    • http://azakalaza3.xyz/12602745819n51cu.pdfIn PDF document text
    • https://gunomelovolif.weebly.com/uploads/1/3/4/7/134735852/batosubisedini.pdfIn PDF document text
    • https://gazisaki.weebly.com/uploads/1/3/4/3/134371182/mapanutivazokesesa.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/67a797a9-3b82-4f6d-94aa-8c266cd63ebe/how_much_oil_does_a_honda_gcv160_take.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35722a43-5b7e-4888-b155-e383bbdf6fdf/star_wars_comic_book_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b718508f-6b45-4373-9c45-3169f910d031/webaropukonivoxuvanaxilim.pdfIn PDF document text
    • https://d54d55f4-8004-4613-9f19-7b96cbed0ae7.filesusr.com/ugd/ce4b32_4cdc747de0b04511a1203cb9f7643a6c.pdf?index=trueIn PDF document text
    • https://a2fe464c-28d1-4db8-bb2d-552ad9bc2f4d.filesusr.com/ugd/941bb1_90ce884cbb40403b81e7dcfac29d0bcd.pdf?index=trueIn PDF document text
    • https://30383b9b-b26a-44f4-9a26-03873af8f03c.filesusr.com/ugd/fdee49_923c3b69eed6401db33f38a5020104b1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bd41688-1a2f-4c12-aa2c-8d241f2121c5/tabla_de_verbos_regulares_e_irregulares_en_ingles_con_pronunciacion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83a0c6f3-3d48-4de2-923f-ed2c2e7b6fbb/savetejabalaregoxaxaf.pdfIn PDF document text
    • https://2489a575-72f7-492f-b117-28cfe4a4d2a3.filesusr.com/ugd/d81705_df28103883bb4ea6b2f9d3924be4b9c9.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15471 4728 bytes
SHA-256: cbcf911e6b10244d74bbb3007a716e5aeae224afa54ed0d5994a81b26bc6475a
font_01_sfnt_off000164ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164AB 11772 bytes
SHA-256: 7d6a2406e3734afbdcf214c71069c19826fca03ee98ce8c0350e7ffb925c48fe

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