Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b7ccc4a256eaac4…

MALICIOUS

PDF

72.4 KB Created: 2021-03-16 07:20:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 0ee71796744b69c082a8788afd8dbe23 SHA-1: 8e7014af0d4114512c8306048b04b3706d6b58fd SHA-256: 8b7ccc4a256eaac4af12d64d4749651d60c58097b5234693c6cd2d7cea8fbed7
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that points to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The document body, though heavily obfuscated, appears to be a search query related to an audiobook, suggesting a social engineering pretext to drive users to the malicious URL. No scripts were extracted, but the presence of external URIs and the overall detection profile strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://mezovuduw.ru/wix?keyword=a+raisin+in+the+sun+audiobook+librivox PDF link annotation
    • http://pagefufobixew.22web.org/zegemikigelegofugiwun.pdfIn PDF document text
    • https://cdn.sqhk.co/devurekon/niejbiJ/2d_racing_games_pc.pdfIn PDF document text
    • http://vamoktin.ru/venom_carnage_unleashed_comicq77xr.pdfIn PDF document text
    • https://cdn.sqhk.co/wawabosamugo/OihduqP/nafapexefolirudojudi.pdfIn PDF document text
    • https://cdn.sqhk.co/vugomupuzisa/Phahfhd/word_collect_answers_level_1887.pdfIn PDF document text
    • https://cdn.sqhk.co/wifuponi/ID9hgjd/az_shooting_hotel.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxinugokas/ghRIHy9/free_muscle_car_sound_ringtones.pdfIn PDF document text
    • http://salebox.shop/bojugefoxobufisanasosom9djdi.pdfIn PDF document text
    • https://cdn.sqhk.co/nujusowidom/PjdaDhf/59449039251.pdfIn PDF document text
    • https://cdn.sqhk.co/toromerepowa/e80VDij/pixifewowatafonegige.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/54284906-9372-43ce-98f6-99c7c1efa1dd/return_of_service_form_washington_state.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6374bc8a-0e7f-4fbf-a28f-86ad05aa337d/53103009094.pdfIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/15116224930.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d33a83c-fc92-45b1-b317-9724abb80a73/52150584964.pdfIn PDF document text
    • https://s3.amazonaws.com/wudibirewuduto/mofitamekeri.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/best_android_emulator_for_streaming_tv.pdfIn PDF document text
    • http://melaworogafema.epizy.com/ice_sheet_vs_glacier.pdfIn PDF document text
    • https://s3.amazonaws.com/patilawasu/lugakubi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37afc81e-b8ca-43a8-b1a6-f58de1601e83/can_i_use_my_own_modem_with_verizon_dsl.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_off0000daa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA7 5236 bytes
SHA-256: 23053619532f980257a729fd9dc47a303faf38fcbe8ecd5345ecae1522c49b39
font_01_sfnt_off0000ec6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6C 12056 bytes
SHA-256: 90c650a2fbc5b35cab6633e534f9ddf980a047a50655b625be09db155fb252d5

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