Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aff84d621c83ac7…

MALICIOUS

PDF

303.0 KB Created: 2021-04-01 19:34:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 423e6fdfceaaa6ded80c13935af9aaf3 SHA-1: a565af8d0886cf3537fdd55887c839af2a606ed0 SHA-256: 8aff84d621c83ac7175baf9dd1e171c6dce2d84b344a6fdb9849767d61260430
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document employs a lure related to the 'Brandon Lee the Crow soundtrack' to entice users. It contains an external URI and an SEO redirector link, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving the download of a second-stage payload from the identified URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9841

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://druttle.ru/strik?utm_term=brandon+lee+the+crow+soundtrack PDF link annotation
    • https://jukatuve.weebly.com/uploads/1/3/2/7/132741058/xugipedigozugog.pdfIn PDF document text
    • http://pusewuvi.medianewsonline.com/class_11th_ncert_psychology_book.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365649/normal_60515bd34518e.pdfIn PDF document text
    • https://fuxarudoniw.weebly.com/uploads/1/3/5/3/135350341/822395.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426687/normal_60579626ba517.pdfIn PDF document text
    • http://pusewuvi.medianewsonline.com/kewovodavixikenila.pdfIn PDF document text
    • https://fuwupizur.weebly.com/uploads/1/3/5/3/135390256/zetokabefafoso_puzavarorerexe_gulufova_mekup.pdfIn PDF document text
    • https://paxowamowutujaf.weebly.com/uploads/1/3/4/3/134322095/migoxenekato-tepubovas-mowode-wulobi.pdfIn PDF document text
    • https://gavuzidawosowek.weebly.com/uploads/1/3/1/4/131413418/53033ba.pdfIn PDF document text
    • https://larulevi.weebly.com/uploads/1/3/6/0/136004384/227372.pdfIn PDF document text
    • https://nulixosur.weebly.com/uploads/1/3/4/3/134311840/7464134.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412388/normal_5fdeb3345e702.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381108/normal_6057ee0c386f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413967/normal_5fd9184655b4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463552/normal_5fd6804297a1b.pdfIn PDF document text
    • https://kivutafiderok.weebly.com/uploads/1/3/4/5/134598466/sewilofe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482215/normal_6001e16191ac6.pdfIn PDF document text
    • https://pigulanofalo.weebly.com/uploads/1/3/1/4/131406379/vefanulikurut-firimotizisa-maxutasuzug-xojotuwe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://timojodabemisux.myartsonline.com/basic_linux_commands_list_with_examples.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0004766e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4766E 5232 bytes
SHA-256: fab9e0719dfec3ddd5b972aa3e2249b924962fd7cfad40dd31b91eeb88ef150e
font_01_sfnt_off00048842.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x48842 10524 bytes
SHA-256: 5a1a34f465f1490d90d81259238b88bb368c785c3879c12a862227f1d67aae5b

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