Malicious PDF — malware analysis report

Static analysis result for SHA-256 54d1f18ce53a6367…

MALICIOUS

PDF

144.9 KB Created: 2020-12-14 12:11:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 5f3f452b18f004df9165c727a3893178 SHA-1: 1e9cb9e39ae7592df3a0f958e4c347ce9d6fa89c SHA-256: 54d1f18ce53a6367fd0219b4228ad3c1f60a4dbdb79c8f365694f536305fcc13
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 detected as malicious by ClamAV and an ML classifier. It contains a high-severity heuristic indicating it's an SEO redirector link, disguised with a "Super bass lyrics meme" lure, pointing to the URL https://traffnew.ru/strik?utm_term=super+bass+lyrics+meme. This URL is likely used for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9895

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://traffnew.ru/strik?utm_term=super+bass+lyrics+meme PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tometubufimopim/30701964952.pdfIn PDF document text
    • https://s3.amazonaws.com/sepawi/element_crossword_puzzle_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/60568260933.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cea540d-94f9-4324-a282-eb7bd1730794/81057598617.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/48255297982.pdfIn PDF document text
    • https://s3.amazonaws.com/dojonuta/sanam_teri_kasam_full_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27743a6d-945e-4444-b474-e94ec1aa3d12/wodexolit.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/fapud.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/baptised_and_sent.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/calculator_app_development_in_android.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000ff96.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xFF96 84548 bytes
SHA-256: 4232d49763a6c1dcdc43297c79aa0fd4a50a9f8f8611525a1722b1d67f527280
font_00_sfnt_off0000d727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD727 8340 bytes
SHA-256: 030f16b84f2c252b1289d97199fe4251c4f3445ac1d4e83ac2a170e588bdf1a3
font_01_sfnt_off0000ed3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3F 5424 bytes
SHA-256: b1e030b556b0f5303a66a231d65d987469f1435f989031668901c731160bd598
font_03_sfnt_off0001e1e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E1E7 11304 bytes
SHA-256: c7200fcadb97421341c4b60a03ca9b67611c7e6a15b4f77b049dd3c3ce53ff6a
font_04_sfnt_off00020807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20807 22344 bytes
SHA-256: 80a65889f37d0d2248a223584a96b457371c76492ffa098e7dc88a4c028e1a35
font_05_sfnt_off00022e61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22E61 1764 bytes
SHA-256: 0003ceb3959d8cea1494f07645d4a9ba77ba3555bb90a681ab9970d990e3d80b

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