Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd1bd6ec1ca82cd2…

MALICIOUS

PDF

77.6 KB Created: 2021-03-13 23:00:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 47202a524bbea876a60d1b3428ef158d SHA-1: 226e4fd2ddbbde5f92d9111bd512b3cce4ceb874 SHA-256: cd1bd6ec1ca82cd272a54ef30592085fb67426241a39644f419a4876bd3cb6b0
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document contains an embedded URI and an image lure that redirects to 'https://dugedepap.ru/strik?utm_term=the+rockpile+by+james+baldwin+characters', suggesting a phishing attempt disguised as a free download. No scripts were extracted, but the presence of external links and the nature of the heuristics point towards a malicious document designed to lead users to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://dugedepap.ru/strik?utm_term=the+rockpile+by+james+baldwin+characters PDF link annotation
    • https://cdn.sqhk.co/dubibuwa/JnROchd/60249085932.pdfIn PDF document text
    • https://cdn.sqhk.co/zetanitanedo/ggghjXP/mefibog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467306/normal_6027e8f3c1130.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415748/normal_600dffe890c32.pdfIn PDF document text
    • https://cdn.sqhk.co/guzikiku/jLhpwiq/welav.pdfIn PDF document text
    • https://cdn.sqhk.co/zanuvajebodu/UjjCjiN/free_images_500px.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421208/normal_604a99dd83530.pdfIn PDF document text
    • https://cdn.sqhk.co/roratumopiv/8gcGMhc/peripafofimu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416664/normal_5fef10b9ce293.pdfIn PDF document text
    • https://cdn.sqhk.co/rikopekela/bcSZjiR/55077147717.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425214/normal_6020a76387ff8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374536/normal_5fe1875bb1ded.pdfIn PDF document text
    • https://cdn.sqhk.co/murajefovel/jiiXjeG/sandeep_maheshwari_video_speech.pdfIn PDF document text
    • https://cdn.sqhk.co/gevolonovare/jcijihe/6741443142.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368756/normal_6027213cb35c1.pdfIn PDF document text
    • https://cdn.sqhk.co/momogajopi/gjjaCid/tibetan_singing_bowls_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/sajunabinume/fjbhbjS/47460959008.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422876/normal_5fec1bd2a0512.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403539/normal_5fe3a33312d96.pdfIn PDF document text
    • https://cdn.sqhk.co/sirijunubi/KjziaM3/gba_emulator_pro_apk_uptodown.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f0f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F3 5736 bytes
SHA-256: b4c48321242f2bef1e8242f893e5823c13873f4c7e50fd5ac29a7cbc8a2a50e2
font_01_sfnt_off00010458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10458 10792 bytes
SHA-256: d5ef5d25b599561df0b000b09c3d000ab9adff5653579a25583e788c5b115ebf

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