Malicious PDF — malware analysis report

Static analysis result for SHA-256 93dbfc63d9c88086…

MALICIOUS

PDF

70.5 KB Created: 2021-01-03 08:02:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 70c75324ab4582f4b9d7835066233fb7 SHA-1: 9fcd3180328601b96ecfc9ee31ba034312c6cdb7 SHA-256: 93dbfc63d9c880861648b19901b688302bb9faa3b128a0dd8d1de4256120076c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating it is a malicious redirector, specifically designed for phishing or malware distribution. The embedded URL `https://cctraff.ru/aws?utm_term=athens+academy+taguig+uniform` is flagged as a known malicious redirector. The ML classifier and ClamAV detection further support its malicious nature. The document body, though heavily obfuscated, contains text related to 'Athens academy taguig uniform' which likely serves as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/aws?utm_term=athens+academy+taguig+uniform In PDF document text
    • https://cdn-cms.f-static.net/uploads/4481675/normal_5fb4013ce62a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370087/normal_5f884fd48f2b3.pdfIn PDF document text
    • https://cdn.sqhk.co/xewimoziwuvo/mji6f3u/beat_the_boss_2_mod_apk_android_1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366976/normal_5fd18280d06d4.pdfIn PDF document text
    • https://cdn.sqhk.co/risubibasero/X6hynfD/dinosaurs_world_map.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0c060cd-1242-4004-92d6-4fb5228a82af/jovujisuvidirabuk.pdfIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/tekejedebafulus.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/vumijug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c63c813-711b-4cc6-bb26-568e28484655/35319515335.pdfIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/bajirao_mastani_tamil_movie_free_tamilrockers.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/86989124156.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_off0000d0cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0CB 5496 bytes
SHA-256: 7d866f1cb527492e322e61398ba3ae27d9214f1e3feb3a8262400d5e9734d3a0
font_01_sfnt_off0000e35f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35F 12268 bytes
SHA-256: 659179ecd4ca1fcbcb5c398590c9286b59bb11801a0d784f949cb85bfaf75255