Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cc73e04f4dd97f7…

MALICIOUS

PDF

74.6 KB Created: 2021-02-11 19:30:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c41201d8b68618eda259d530df1fca76 SHA-1: a3ec692126adcce44acdbbe0e4b5aa12a9e1741e SHA-256: 2cc73e04f4dd97f7eb7fa47efb631b777e203c349d3d3c0e9d168e6e54c7b15b
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 it is a phishing or trojan delivery attempt. The embedded URL and document body suggest a lure for free software downloads, a common tactic for phishing. No scripts were extracted, but the PDF structure itself facilitated the redirection to a malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wb?keyword=hp%20pc%20bluetooth%20software%20free PDF link annotation
    • http://salonhq.xyz/50978516139iz84s.pdfIn PDF document text
    • https://cdn.sqhk.co/xidatelo/fibFicy/flashlight_song_pitch_perfect_2_scene.pdfIn PDF document text
    • https://cdn.sqhk.co/raxoxawupej/jeZjjjf/23722773947.pdfIn PDF document text
    • https://cdn.sqhk.co/pekobenew/c0m5MDx/vetubibokibumujibeni.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494431/normal_6000c8c0f34dc.pdfIn PDF document text
    • https://cdn.sqhk.co/virurewev/exmF59l/jovian_planets_in_order_of_increasing_mass.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/mesixadelomomo/35501089587.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/5701580023.pdfIn PDF document text
    • http://ximuviliduxa.rf.gd/kupete.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/42610555732.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/43371016547.pdfIn PDF document text
    • http://rawuwad.epizy.com/353280686.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/casio_fx_991ms_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/jesevonarokusodupajoso.pdfIn PDF document text
    • http://lefajiw.epizy.com/ecommerce_template_html.pdfIn PDF document text
    • https://s3.amazonaws.com/mozirolinitaje/bdo_kamasylvia_side_quests_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/calculate_standard_deviation_in_excel_manually.pdfIn PDF document text
    • http://gadoxijumulop.epizy.com/xulunawegefuloravimajevi.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_off0000e708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE708 5296 bytes
SHA-256: 1cd89f55b5bdfd58b8eb7fbe306fb0caa7d72519d49fc6527d379c0d024982e2
font_01_sfnt_off0000f910.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF910 10712 bytes
SHA-256: 77f6fbff214f978b919c51ecd07dff949d33eb089db5047a888296a5453e2273

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