Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b461b70c37f25bf…

MALICIOUS

PDF

74.8 KB Created: 2021-02-15 10:10:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: ef6f94b9f1243fd91e0514cc11564e33 SHA-1: c8e0d1a30c96154f4e455eb4768337ac76c46a0d SHA-256: 9b461b70c37f25bf263ad293c0e2d1af3b6db88553dc39a0eff5818559b87dd2
254 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document is designed to redirect users to malicious websites, masquerading as a "treasure guide" and employing SEO tactics to appear legitimate. The embedded links and the ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself facilitates the redirection.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://crophysi.ru/wix?keyword=bbs+treasure+guide In PDF document text
    • https://static.s123-cdn-static.com/uploads/4451033/normal_5ff3ddee4628f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409425/normal_5fe91b2616487.pdfIn PDF document text
    • https://cdn.sqhk.co/rogenujudita/iiAieJz/21885956631.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383582/normal_6001b0bc553c9.pdfIn PDF document text
    • https://boleturem.weebly.com/uploads/1/3/4/3/134398498/7049572.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372702/normal_601340e91ddc7.pdfIn PDF document text
    • https://rafopotoze.weebly.com/uploads/1/3/4/6/134609035/wofujitufej-bejifujodogomo-fimasuweb.pdfIn PDF document text
    • https://radumudoxelis.weebly.com/uploads/1/3/4/2/134235428/7188144.pdfIn PDF document text
    • https://bumewotosebixab.weebly.com/uploads/1/3/5/2/135298585/teditevixapisis-rulimuda-bukomobato.pdfIn PDF document text
    • https://cdn.sqhk.co/zexetiminav/uAjf4jf/povogupupuvap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388046/normal_5fdc18743a84b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403817/normal_6026fae68aa5f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417403/normal_5ffa512a113bf.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/vonuxagupeduze/barbacoa_de_res_informacion_nutricional.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/philips_avent_manual_breast_pump_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/kumaxiserunurewezuv.pdfIn PDF document text
    • https://s3.amazonaws.com/ginutu/69768683890.pdfIn PDF document text
    • https://s3.amazonaws.com/fajetufekejo/zoburasabuwiras.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_off0000e826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE826 5152 bytes
SHA-256: b27eab38c260241b8d1452ecdc4d67796ff432f48b7e318773bd086a5e91a329
font_01_sfnt_off0000f9b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B4 10748 bytes
SHA-256: 4d574ab5d4c274393f978ef479b329db86e3f61716cd785ac57f2e1f031245b9

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