Malicious PDF — malware analysis report

Static analysis result for SHA-256 c275c12119f32d01…

MALICIOUS

PDF

78.1 KB Created: 2021-04-01 17:54:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 64fa17ae47c79d9641760c791c932b5c SHA-1: 238aa777fc4d2938d451434210fda3304120548a SHA-256: c275c12119f32d014b16d14f1c4c7ae7ace670fdabf3baaa553d5bcc9f7cb41e
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 0.9997

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://pelibifir.ru/123?utm_term=donor+and+acceptor+impurities+pdf PDF link annotation
    • https://wudonazig.weebly.com/uploads/1/3/4/6/134675044/newize_nixajifupox_wemuma_wexidomepifix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425772/normal_5fddfc9342f70.pdfIn PDF document text
    • https://cdn.sqhk.co/guzoladip/fggjfji/jalibesa.pdfIn PDF document text
    • http://thedouche.xyz/navedetuzejisiginafiyx6zl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368487/normal_60366a53ccae3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385028/normal_5feee1872fa29.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379231/normal_5ff5cd1a53ce4.pdfIn PDF document text
    • https://cdn.sqhk.co/gumakulex/0mzIjvB/kaxifezeruvikija.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485939/normal_60159c814fa4f.pdfIn PDF document text
    • http://otshelnik.net/767774814me6xu.pdfIn PDF document text
    • https://verijijul.weebly.com/uploads/1/3/4/8/134861220/0ea3233040d.pdfIn PDF document text
    • http://natalonofawoba.22web.org/mapamundi_politico_para_colorear.pdfIn PDF document text
    • http://filmera.ru/c_async_programming_guide0fsiu.pdfIn PDF document text
    • https://najigojuvunijo.weebly.com/uploads/1/3/0/8/130874658/b9a9f2d40c6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://d896c2b7-539c-4146-aa8a-b39d26e096d8.filesusr.com/ugd/a98ecc_e9989b0298414b35818dcd5d6d92222d.pdf?index=trueIn PDF document text
    • http://gipunixufekuto.epizy.com/how_to_find_financing_cash_flows.pdfIn PDF document text
    • https://2521c3e2-5736-45bb-9381-71005f2ffa37.filesusr.com/ugd/c85705_3ccebafa6e154f62a6567f87a3c88c95.pdf?index=trueIn PDF document text
    • http://gizugutopaf.epizy.com/brothers_of_peace_songs.pdfIn PDF document text
    • http://gedatedemokuju.epizy.com/20859472021.pdfIn PDF document text
    • https://436c154b-1c2d-4c60-9768-ed3a268ef5e1.filesusr.com/ugd/e8e253_02b9745f4c684ed2a2d24f0385281ec5.pdf?index=trueIn PDF document text
    • http://jazoxuxorilule.epizy.com/algorithms_in_c_parts_1_4_free_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C5 5148 bytes
SHA-256: 36cd1bb2d497276b9e24f705ec1e16770a2f4e15ac155731b77acfc02b263be0
font_01_sfnt_off0000f92b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF92B 10384 bytes
SHA-256: 14d2538efbe81517a5d74166c6cc905165dd666e690593fdd55ce4041337478e
font_02_sfnt_off00011cc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC9 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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