Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c735e2732bd495c…

MALICIOUS

PDF

73.8 KB Created: 2021-04-06 19:46:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c8cf85b6ab2a194553ab34d954ab2363 SHA-1: 5842e1658bcdca6704d3c0fca9291aa3b897c7ce SHA-256: 6c735e2732bd495cc9ba7ef5f3e3d9cef61eca911c9bdadf30aa3d4399dae444
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 0.9999

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://midufefew.ru/strik?utm_term=john+deere+lx255+troubleshooting PDF link annotation
    • http://kind-insta.site/lobowivawa6vy4g.pdfIn PDF document text
    • https://virerulifig.weebly.com/uploads/1/3/1/4/131407283/wejeme.pdfIn PDF document text
    • http://tedusoxunola.22web.org/annamayya_cinema_patalu_ing.pdfIn PDF document text
    • http://bluebadge-support.com/rokamujepopojebamitigunnvi8.pdfIn PDF document text
    • https://kenaveduku.weebly.com/uploads/1/3/0/8/130813649/8c21e06713c6b7.pdfIn PDF document text
    • http://vinnipoh.fun/nekazomibuvuzisw2v4.pdfIn PDF document text
    • http://smartcoin.design/royal_hawaiian_sandalwood_hydrosol_para_que_sirveto724.pdfIn PDF document text
    • http://unreguezff.rest/who_sings_in_christ_alone_my_hope_is_foundnm42y.pdfIn PDF document text
    • http://hurricane1.space/the_boss_baby_in_hindi_full_movie_dovvimo.pdfIn PDF document text
    • https://sopunarexij.weebly.com/uploads/1/3/1/8/131857112/gimegotusig.pdfIn PDF document text
    • https://nazawerud.weebly.com/uploads/1/3/4/3/134353719/8625885e68.pdfIn PDF document text
    • https://xutawolovunoka.weebly.com/uploads/1/3/0/7/130739399/kavawuralew_watoduz.pdfIn PDF document text
    • http://lnstagramsupportlives.com/33653147952tqfgw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://beea745c-e446-4317-9ad8-fe501d584c0a.filesusr.com/ugd/9196db_073822138b344e94b2a660f71fbf8be2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7aed47ce-5265-45ce-92fc-9230486f611e/92273141220.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a55eacd-00a1-45b6-9a50-b80687c7c65b/loxipinakorefowawela.pdfIn PDF document text
    • https://74a5c9af-61bb-4d76-9351-4d02c0bf652a.filesusr.com/ugd/e33828_35d418693b5646a0b00b0abb58b471e7.pdf?index=trueIn PDF document text
    • http://samipada.epizy.com/how_are_runts_candy_made.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_off0000e1fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FD 5332 bytes
SHA-256: 1b9bd032ad17e14334ada990437e6c06a8b73a27a00d0f992e6e3541d8ddf427
font_01_sfnt_off0000f417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF417 11212 bytes
SHA-256: 5a90fc00e5509d670bd852d233985ae0a4958f2ab48390563ba7ae19a1b09ade

Open this report in the interactive analyzer, or submit your own file for analysis.