Malicious PDF — malware analysis report

Static analysis result for SHA-256 0366cb486c907e13…

MALICIOUS

PDF

120.1 KB Created: 2021-03-16 15:28:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 533c2b0fdbd4eb885b34312effb24e0a SHA-1: 5f65e4a99083bcf70d4101c494bf0db94478bf23 SHA-256: 0366cb486c907e13b8223e9597ce71d3633740935e06d66d81f6766e957bad49
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 0.9995

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
  • 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://vilenefex.ru/strik?utm_term=neurolinguistisches+programmieren+lernen PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417122/normal_602e391594cc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413973/normal_601ef0bcbe081.pdfIn PDF document text
    • http://defi-bet.world/evenflo_stroller_cleaning_instructions3uohl.pdfIn PDF document text
    • http://natalonofawoba.22web.org/csir_net_dec_2019_answer_key.pdfIn PDF document text
    • https://litunuvojiv.weebly.com/uploads/1/3/0/9/130969221/2174898.pdfIn PDF document text
    • http://xiwezalibo.22web.org/forifazijegekegiv.pdfIn PDF document text
    • http://rupebakonodeja.iblogger.org/19019021149.pdfIn PDF document text
    • http://mereravewesone.iblogger.org/87749553166.pdfIn PDF document text
    • http://shothard.site/67856745124soaxj.pdfIn PDF document text
    • https://nifirasevaxo.weebly.com/uploads/1/3/4/7/134756957/jusipozugobovu_gakikokekuwaji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461511/normal_6031d85828fd5.pdfIn PDF document text
    • http://english-10.site/587706827258cyvt.pdfIn PDF document text
    • https://nonafinawajag.weebly.com/uploads/1/3/4/3/134331790/titazotajis-virub.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://85ed388a-52e0-4e79-9737-9d4b769dda71.filesusr.com/ugd/bb10c5_891330bec4854f3ab3af620cc96f401e.pdf?index=trueIn PDF document text
    • http://vedirananu.epizy.com/abbyy_transformer_plus_serial_key.pdfIn PDF document text
    • http://bibibojusajol.rf.gd/kojewawuvabez.pdfIn PDF document text
    • http://meganafekeki.epizy.com/7271944428.pdfIn PDF document text
    • https://c370dac7-4848-4fa0-a6df-94361299e8ba.filesusr.com/ugd/fa6303_6eb40f5d492649f99d1065dc3a95a948.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001740d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1740D 5200 bytes
SHA-256: 10802ff5c2d3d77e4d92a81229c3b2ee39a24b58a0eb17df83a5459bc9b58abe
font_01_sfnt_off00018594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18594 12716 bytes
SHA-256: 73d72cfba7a8d6df63e4309d59720ccec1df39f8e343c5a68847ed8a7382b2d9
font_02_sfnt_off0001af44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AF44 16060 bytes
SHA-256: 99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953
font_03_sfnt_off0001c3de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C3DE 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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