Malicious PDF — malware analysis report

Static analysis result for SHA-256 48dab01a660a2726…

MALICIOUS

PDF

76.1 KB Created: 2021-07-12 21:41:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 5105c879375f0583de7c649252d6c519 SHA-1: 8bcf2ffe2a00d0103c4f0c6273f04cb5580f757c SHA-256: 48dab01a660a272603c0d1605f6748c1d2595275cc4e6bde1b6edc3bc6937775
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning model assigned a high probability of maliciousness. Heuristics indicate the presence of an external URI and an image lure linking to an SEO redirector, specifically pointing to a URL that appears to be related to 'free spins'. The document body is heavily obfuscated, preventing a clear understanding of its direct content, but the overall pattern suggests a phishing attempt to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://feedproxy.google.com/~r/sq/ugae/~3/v-xubMviL4Y/square?utm_term=free+spins+in+coin+masters PDF link annotation
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec879ead1bf7105ccc352d/1626113951177/baden_powell_quotes_happiness.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e916d03f195e1e4035f9da/1625888464914/tawemij.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8ce308f67167615ad0a7a/1625869872402/instant_to_word_converter_online_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec872a3f7a034ccb7b0176/1626113834178/commonwealth_questions_and_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7a1674d2175279d1041b2/1625792872019/stages_of_osteoarthritis.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec86705f604029b991d3f5/1626113648538/books_on_business_administration.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec8803668ba31612b6886c/1626114051258/gafiwi.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e953c2f4fe78435a3c32bc/1625904066300/how_to_combine_files_on_windows_7.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8f8718915684aa53b79e8/1625880689841/how_fast_can_u_go_on_a_spare_tire.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7a6f74b964f05b8453b9b/1625794295098/33737610811.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB6D 16032 bytes
SHA-256: 496978475ec83eae807a01ecb5fad50e5c560250cf44dbe177cb75e59e435109
font_01_sfnt_off0000f4b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010cd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD0 10468 bytes
SHA-256: 67fe22d219569add65cd0dbc9c0769bc759c51b79e4f614d8bce760f90c35a28

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