Malicious PDF — malware analysis report

Static analysis result for SHA-256 6666e0f6ecdfa588…

MALICIOUS

PDF

66.4 KB Created: 2021-05-13 21:59:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 23d26297b8a56d2efa082b95aaaa6a16 SHA-1: acab76f0ac90039453e5b140f8e31c898b1ab0d1 SHA-256: 6666e0f6ecdfa58800eeb47064082772c01fad6ed70b8bbf16c00e85478235f2
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized and point to other PDF files, suggesting a link farm or content stuffing tactic. The primary URL, 'https://jottigo.ru/wb?keyword=the%20fact%20of%20blackness%20frantz%20fanon%20and%20visual%20representation%20pdf', appears to be a lure designed to attract users searching for specific content. ClamAV and ML classifiers also flagged this PDF as malicious, likely due to its deceptive linking strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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.
  • 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://jottigo.ru/wb?keyword=the%20fact%20of%20blackness%20frantz%20fanon%20and%20visual%20representation%20pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446275/normal_6034508144b8c.pdfIn PDF document text
    • https://cdn.sqhk.co/pidodalatip/ieibExJ/crusaders_quest_skin_tier_list.pdfIn PDF document text
    • https://tivirubopif.weebly.com/uploads/1/3/1/4/131406506/3813204.pdfIn PDF document text
    • https://tifowufiwadoxi.weebly.com/uploads/1/3/4/0/134098290/gazitelibazer-bejuwasibeda-voxisukewo.pdfIn PDF document text
    • https://sekugiwa.weebly.com/uploads/1/3/0/7/130739582/5d6cd87cf8f6102.pdfIn PDF document text
    • https://cdn.sqhk.co/vujalenan/fOhBgfA/asgard_wrath_vr_oculus_quest.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446273/normal_5fe3471b22148.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486060/normal_5ff84a7e53fa5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484805/normal_603f877160aa4.pdfIn PDF document text
    • https://kosefunoz.weebly.com/uploads/1/3/0/7/130775186/lidurekakoxupiku.pdfIn PDF document text
    • https://wamibujobaju.weebly.com/uploads/1/3/4/7/134716207/1910534.pdfIn PDF document text
    • https://rinixupikexem.weebly.com/uploads/1/3/4/0/134096042/397962.pdfIn PDF document text
    • https://vurerabekude.weebly.com/uploads/1/3/4/4/134493837/2733374.pdfIn PDF document text
    • https://sapafusazefo.weebly.com/uploads/1/3/4/4/134496158/sumotinaw-ronidu-kaluwemapisaduz.pdfIn PDF document text
    • https://dibapanapuro.weebly.com/uploads/1/3/0/7/130776085/woregugakewafovo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388052/normal_5fc752d0e3cf2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gulapore/jogikadaxijikekosisuzuxur.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/93053363971.pdfIn PDF document text
    • https://s3.amazonaws.com/dinigugaxej/51052748580.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/kudaju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64dfb147-2866-4f2d-8c55-da49f2c524b2/how_google_search_works_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39ccbd25-1f52-43e0-96cd-7e84946cb9b8/42615318360.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0254e6a8-71c1-40b5-8c98-a23e13b06383/malawusunusuluripisovisu.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_off0000c680.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC680 5504 bytes
SHA-256: b6776ac7b153b7a8afdf93766c174c7185c8217e4481b9cd2dbb65a1ab921e7f
font_01_sfnt_off0000d93c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD93C 10076 bytes
SHA-256: cc31430e36390e0d222cf8d96abf6880be7e7581f39848669532f9343f396ae1

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