Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0e023d9c640e4af…

MALICIOUS

PDF

76.3 KB Created: 2020-12-27 16:05:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 21be0b533a61ee78bb7ea8b559c74d00 SHA-1: 9ddd8d40432d481b120f8830bc36fd9253916081 SHA-256: d0e023d9c640e4afac3e5e35e45255dafc874d50eb63cf099fe84c897454fe5e
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://trafffe.ru/strik?utm_term=knights+inn+motel+grants+pass PDF link annotation
    • https://juzudibat.weebly.com/uploads/1/3/4/3/134328144/9796236.pdfIn PDF document text
    • https://jewezuwexokuj.weebly.com/uploads/1/3/4/7/134717424/6344733.pdfIn PDF document text
    • https://lifotuvuzaraxur.weebly.com/uploads/1/3/0/7/130775275/puvuba.pdfIn PDF document text
    • https://kuvejepi.weebly.com/uploads/1/3/4/4/134452054/panituje.pdfIn PDF document text
    • https://gumopukuzi.weebly.com/uploads/1/3/4/4/134481114/5952550.pdfIn PDF document text
    • https://jufukakoxojopop.weebly.com/uploads/1/3/4/3/134317893/7592557.pdfIn PDF document text
    • https://xumuxurubaxuk.weebly.com/uploads/1/3/4/5/134501003/7558513.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://uploads.strikinglycdn.com/files/8feca616-dbe3-4bc0-a57d-849805821ccb/zakiguvumedi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/906a6b76-29e4-4325-8f4a-fa3f86782eb0/clk_320_aftermarket_radio.pdfIn PDF document text
    • https://s3.amazonaws.com/mawesenasijoser/luvexilidifikasabezub.pdfIn PDF document text
    • https://s3.amazonaws.com/pegozegi/lolona.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/natalixoxaxesozomulufu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3902874-abf5-4e33-a63b-8614a6f6e8cf/zero_hour_maps_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/xidulumexi/30359390391.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c059e8f2-85e0-468f-9e9e-aeeb9f7ef202/95023837507.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9b5fed5-cdcb-448b-bd3e-2a980fab5236/kirevivofepumatidemari.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_off0000e110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE110 4992 bytes
SHA-256: d191c6f10b55a555e1bdbe3470f4d0e71c646d6aba626402d8424a1d198273e6
font_01_sfnt_off0000f1d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D3 10816 bytes
SHA-256: 987cf82eb023ac5781245028e62746720eae416d913486d910530f000ee9afc1
font_02_sfnt_off0001164f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1164F 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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