Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1aca410c55cb0ba…

MALICIOUS

PDF

95.4 KB Created: 2021-07-13 04:40:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: d11d9469931e4a50ec9a16fbcd5ea9e2 SHA-1: cddba4d9f16465455a2c2b3046419bebf48e850c SHA-256: b1aca410c55cb0ba0b9879df80ac437672757e81fea039bce710d01e7424dd91
76 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic firing for a 'SEO UTM Redirector Link' which points to a URL that appears to be an image lure for free downloads, a common phishing tactic. The ML classifier also flagged the PDF as malicious with high confidence. No scripts were extracted, but the presence of embedded URLs and the nature of the heuristics suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • 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://cructi.ru/square?utm_term=subnautica+vehicle+modification+station+placement PDF link annotation
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec8ff39c874e714248a676/1626116083768/motabuguveduxutulerirefav.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e9096df492d21a0f69f167/1625885037279/out_of_county_warrant.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7ddcff4d7c53d8b1351f9/1625808335599/31961647598.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ecba3658bd604bb874813e/1626126902202/trig_star_problem_local_contest_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec968e9a1cf201f8064b6c/1626117774949/signs_of_cellulitis_infection.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ecb60349e93b1e4da18753/1626125827692/quotes_about_not_playing_games.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7e93745e16b3be7ea6413/1625811255601/periodicals_meaning_in_english.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ecdbd04918f36a6d587d26/1626135504590/nanokijorozogosikerax.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec83d8b8cbe518df57cc77/1626112985018/akon_lonely_song_ringtone.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ecedd0937216722044ae8b/1626140112519/the_space_dance_centre.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 4

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_off000112f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112F6 11168 bytes
SHA-256: cc3a02d7f9e3cafbf4c99977907e7822e7b5c910c3669ebf22d5fc1e83681e61
font_01_sfnt_off00012ca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CA9 16836 bytes
SHA-256: d4590b5da0adb1d63f1d55d220bcdac58fb93a7d72f40455f6427799b0274acd
font_02_sfnt_off000158c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.