Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdb53eb3fa7bc9eb…

MALICIOUS

PDF

81.2 KB Created: 2020-12-28 00:35:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8359443e1f2be0e6ad11fb0f09d61676 SHA-1: f5364c78d6231a7cc2d645247cccb6f071d8590b SHA-256: bdb53eb3fa7bc9eb2a242d0f6411c5dbd096a34ecddf93aebad3492b3f1e9ee8
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as 'Pdf.Phishing.Trojan'. It contains an embedded URL pointing to 'https://trafficel.ru/123?utm_term=snap+on+smile+cost+nz', which is a strong indicator of a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it may leverage embedded JavaScript or other mechanisms to redirect the user to the malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafficel.ru/123?utm_term=snap+on+smile+cost+nz PDF link annotation
    • https://cdn.sqhk.co/nezusoxe/X1r8hjJ/world_of_tanks_assistant_login_problem.pdfIn PDF document text
    • https://virukuzababije.weebly.com/uploads/1/3/4/3/134350100/majatekibimo.pdfIn PDF document text
    • https://cdn.sqhk.co/mozedizupi/Vel33dj/2-_player_co-_op_zombie_shooter.pdfIn PDF document text
    • https://cdn.sqhk.co/vowibesep/q6iilhh/bkash_quiz_trickbd.pdfIn PDF document text
    • https://cdn.sqhk.co/lawafopugu/mjahjtC/space_flight_simulator_1._35_mod_apk_download.pdfIn PDF document text
    • https://kekulepolunan.weebly.com/uploads/1/3/4/8/134889268/miteviko_bidow.pdfIn PDF document text
    • https://fevuxutub.weebly.com/uploads/1/3/4/1/134131759/sunezozuru-selewumiba-zipedak-kojodeme.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/xalasawu/chapter_3_ap_biology_reading_guide_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4246627-3811-471a-ad18-3fab7216f643/90644326255.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11e10f16-6acb-4223-bb00-199bcade63ef/wonomozogopidod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e6c21d8-d164-42a9-994b-63d783d3fe53/23965508613.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f811.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF811 5136 bytes
SHA-256: 122c1ba7af728f0999faba8dc3cfe37261015e2f435dfa6789b0cfd813677971
font_01_sfnt_off00010979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10979 1800 bytes
SHA-256: e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
font_02_sfnt_off00011207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11207 11188 bytes
SHA-256: f47cc7049b135452e69b342cb8568a83719fb6160495d1470444170fce0b085f

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