Malicious PDF — malware analysis report

Static analysis result for SHA-256 a23346377c443342…

MALICIOUS

PDF

247.0 KB Created: 2021-07-21 14:52:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 6fb0828f783ce340c78980f78d677522 SHA-1: f9f4d0ef00a41d237dbf4ce104883998270489d8 SHA-256: a23346377c443342a48083b7caec772c167959ef855b94b08e77f102683e3873
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic indicating it's an SEO redirector link used for phishing, specifically a 'free-download phishing' lure. The embedded URL, https://philabc.ru/square?utm_term=bannerlord+lord+of+the+rings, is the primary indicator of this malicious intent. While no scripts were explicitly extracted, the PDF structure and the nature of the URL suggest it's designed to redirect users to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://philabc.ru/square?utm_term=bannerlord+lord+of+the+rings PDF link annotation
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f6f664f1decb422b663e68/1626797669163/27344626098.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec7a42c217102653d524cb/1626110530543/hyperbaric_oxygen_therapy_near_me.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee23002ee8b51fd9336238/1626219264657/1024023941.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f53dc9aba5f52989bfb365/1626684873797/balises.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec7b88154eb17b684929ed/1626110856618/upper_body_warm_up_exercises_before_workout.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f6a4726466be7755633b3c/1626776691089/objective_and_possessive_pronouns.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60edda7fe635d71664615646/1626200703647/fudawuze.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7d62bf29cd6423db4368a/1625806380036/69242245495.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f46e001434f635472f65c1/1626631680896/examples_of_philosophy_papers.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8e42c3b7e7c63344cc10d/1625875500236/79082107144.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f17886311eab0d81af6f4b/1626437766780/how_to_check_your_manual_transmission_fluid.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f77baa592bc62482eae505/1626831786972/6803353375.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7b686efb14d11220f4872/1625798278805/57295577014.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f2e5cb1db272198f919539/1626531275114/gelebufixesivibudigunoxex.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f555add9389f5e80a56bfd/1626690989243/bobap.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60efe6f3bae8d04216d49ac7/1626334963722/npa_of_private_sector_banks_2019.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f60f7619d3d649d88b447e/1626738550317/fuzzification_and_defuzzification.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec79b6cc9768212241afee/1626110390961/can_i_refreeze_cheese.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f7e32a28ef380684060435/1626858282672/85653701556.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f0bfed2606b657d35106b7/1626390509207/bitigamawofupotaguvu.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00036b4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36B4E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00038365.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x38365 10688 bytes
SHA-256: 04051c24208214fecf45b2005fb089a280c76fab28e140e89b8530dae94202b0
font_02_sfnt_off00039b9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x39B9A 19872 bytes
SHA-256: 16bf8b52e40c839e66ea59a9d4387a979ee9829cd1facaf1e855855fc2ad50ae

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