Malicious PDF — malware analysis report

Static analysis result for SHA-256 a815db6d99d1bacc…

MALICIOUS

PDF

77.7 KB Created: 2021-03-01 14:06:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 4f813b8309b16733c1cef3ed5c9ddb92 SHA-1: b70ca3632a21509641200d189419b906fd8dc520 SHA-256: a815db6d99d1baccdcf854bb7cdca6e3061d2f9a1407d04debae717a98e55bf3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external URLs, many hosted on disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/wix?keyword=invictus+by+william+ernest+henley+meaning PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414336/normal_60281bfd55f8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470841/normal_60322ebbbbf8f.pdfIn PDF document text
    • http://tokexal.medianewsonline.com/joe_vitale_hockey_sidney_crosby.pdfIn PDF document text
    • http://lenuvivureropi.scienceontheweb.net/recipes_for_air_fryer_pork_ribs.pdfIn PDF document text
    • http://naturfresh.space/fuzirukidekawetenizaluvadjd22f.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/68536295283.pdfIn PDF document text
    • http://nizavevorupuj.mywebcommunity.org/xefugelafadigokudile.pdfIn PDF document text
    • http://pocki.top/553756674730m9rj.pdfIn PDF document text
    • http://lenuvivureropi.scienceontheweb.net/zefipuxituzexekojir.pdfIn PDF document text
    • http://vevaxogejaz.scienceontheweb.net/hound_of_the_baskervilles_book_summary.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375891/normal_5fe1e9560cd26.pdfIn PDF document text
    • http://ashotik.space/7091227195jmuuu.pdfIn PDF document text
    • https://cdn.sqhk.co/bisadumiza/R2S6OSd/24003453292.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xuvekixofeku.onlinewebshop.net/how_to_turn_volume_down_on_adt_panel.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_off0000f403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF403 5544 bytes
SHA-256: 535c8b67dcdf987b326ecf53aa7809bc865d6e9926c7ea79ade66390415774ae
font_01_sfnt_off000106d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D3 10144 bytes
SHA-256: ff3519321a436d4496371596af33294305ed16ec26d86ef3982f68730f7feee2

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