Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdc31c44d3291a9e…

MALICIOUS

PDF

81.9 KB Created: 2020-12-28 21:42:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 3ea95781635a40aa77d72c3f522c8db5 SHA-1: e9079f524738dd88a26bbc11a2bdf587f185df4f SHA-256: fdc31c44d3291a9eea66099d9c52f777083f66922729b79e68b453f6ce046002
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document body, though heavily obfuscated, contains text related to 'Nova launcher' and 'apkpure', suggesting a lure to download potentially malicious software. The embedded URL points to 'traffking.ru', a domain associated with malicious activity, likely serving as the payload delivery site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffking.ru/strik?utm_term=nova+launcher+old+version+apkpure PDF link annotation
    • https://cdn.sqhk.co/sojetaji/Tfihsjh/pba_card_police.pdfIn PDF document text
    • https://cdn.sqhk.co/goluxewimabu/pQxjijg/not_guilty_meaning_in_court.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465396/normal_5fe73204dd478.pdfIn PDF document text
    • https://cdn.sqhk.co/pevukoza/i5ojewP/43011408480.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/h_m_mens_ring_size_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1af545ee-45de-4e86-a45b-38cc32e2b56c/biriwizup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b80898a-28ca-4235-85df-b55866b82c84/survival_island_evo_2_mod_apk_rexdl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07d7f8d5-28d9-4b83-92eb-0e1971526066/48908396604.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74b8cefe-e578-41f4-9197-37322d160948/mokevemisipome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77e5dcc9-96f3-4c08-b2e1-6e711ba322be/dekukotapozise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca513f95-081f-491f-9308-9cdf888d7939/miwuvefokexikesekepu.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/business_card_templates_illustrator.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00010b99.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10B99 26176 bytes
SHA-256: ca48c6f399b0e0ac1656fa2fbb998782104e7fabd9298d9a21993e6521449454
font_00_sfnt_off0000d4a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A5 5256 bytes
SHA-256: b5f9748f6e18e962bbc6f7e061cd0250f52586387944746739bcf90b81414963
font_01_sfnt_off0000e685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE685 10796 bytes
SHA-256: 1b6c97a70ff24ac6e7d7063237fa56a0801df139a326ffa418881b589ba62e7f

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