Malicious PDF — malware analysis report

Static analysis result for SHA-256 422927b31047c801…

MALICIOUS

PDF

84.1 KB Created: 2021-03-14 12:52:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1cdb722b4f1ea6040bc94134eb7da570 SHA-1: b1723f67c6e3f7e1cb9207a88da1d72f76227344 SHA-256: 422927b31047c801bd0188923605668d40044c1d5a48299a8a44215596de9620
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a high-severity heuristic indicating it's a lure for free downloads, redirecting to a suspicious URL. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI point towards a phishing or malware distribution attempt via the identified redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://resalured.ru/strik?utm_term=ged+math+lessons PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4488092/normal_6004bb7bce2ca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405674/normal_5febea9618268.pdfIn PDF document text
    • https://cdn.sqhk.co/jowowibow/gdhiWjb/lumepofarut.pdfIn PDF document text
    • http://just-gopro.com/persona_5_art_book_amazone194v.pdfIn PDF document text
    • https://cdn.sqhk.co/gufojakig/ha9DwrA/62315130576.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446161/normal_5fecb426a8ec1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410020/normal_60493ee2379c4.pdfIn PDF document text
    • http://piwulag.sportsontheweb.net/84680559781.pdfIn PDF document text
    • http://nekuwagibajese.getenjoyment.net/attack_on_titan_2_gameplay_android.pdfIn PDF document text
    • http://obzorov.site/66030249953s4s4e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422371/normal_5fff2c236d4dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423460/normal_6041ac5c20d71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459787/normal_5fdcc6c0f3f94.pdfIn PDF document text
    • http://tezuveripoxub.mypressonline.com/shark_vacuum_and_carpet_cleaner_combo.pdfIn PDF document text
    • http://kvrovk.xyz/lonovunutawudujijewasotegktskz.pdfIn PDF document text
    • https://cdn.sqhk.co/sebelokili/hcfhgjj/customer_service_interview_answers.pdfIn PDF document text
    • http://scandisvet.ru/sibogasidapidawarics1pq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374022/normal_603616718272c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427076/normal_5fe58cb3026a4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wibumumodudofud.epizy.com/zelanekobakodoboxef.pdfIn PDF document text
    • http://sowiriged.rf.gd/77674504756.pdfIn PDF document text
    • http://zelimasiropaf.epizy.com/tomotajumuvupudinak.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_off00010c4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C4C 5000 bytes
SHA-256: c823e8d4da2d5522b9a643c0086038c1deb173a9d2ad7407f42c2e06d4de9867
font_01_sfnt_off00011d24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D24 11072 bytes
SHA-256: 6676ec0be0e15b5288efa153228c0788264555f758c9166e63e77df43bf8dfb5

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