Malicious PDF — malware analysis report

Static analysis result for SHA-256 82f2753fbedddbb0…

MALICIOUS

PDF

67.2 KB Created: 2021-02-04 10:03:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f8e9489c0fe853d58a92f9000c4ab2fd SHA-1: afe6358496b50e4416b8ff2f92b826a88bc17de8 SHA-256: 82f2753fbedddbb09df94506df1cff1f545a69d08fdb01f6cff6a80da3a8b2a1
96 Risk Score

Malware Insights

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

The PDF document, disguised as a "Jensen marine radio manual", contains embedded URLs that lead to potentially malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the presence of external URIs suggests an attempt to redirect the user to a compromised or malicious resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://leonvi.ru/123?utm_term=jensen+marine+radio+manual PDF link annotation
    • http://letilemugemin.66ghz.com/waiting_for_godot_book_free.pdfIn PDF document text
    • https://cdn.sqhk.co/kovixileta/pIjaigP/vr_zombie_shooting_amsterdam.pdfIn PDF document text
    • https://cdn.sqhk.co/kafufojugure/eCYjcig/nidiwuve.pdfIn PDF document text
    • https://cdn.sqhk.co/datolabevev/sdkjfbJ/darekilelajojerijagoju.pdfIn PDF document text
    • https://cdn.sqhk.co/balatexoriv/ibghgib/sijediwipajolif.pdfIn PDF document text
    • https://cdn.sqhk.co/rusobotakox/cji3icp/xalepizowewejewa.pdfIn PDF document text
    • https://cdn.sqhk.co/xugosovemi/yauBhfd/mexican_football_player_dallas_cowboys.pdfIn PDF document text
    • https://cdn.sqhk.co/tinipuded/lijligd/empire_z_endless_war_cheats.pdfIn PDF document text
    • https://cdn.sqhk.co/jelivapizivo/bvphahi/radisot.pdfIn PDF document text
    • https://cdn.sqhk.co/rifokinimito/iFm81je/rock_climbing_near_me_for_adults.pdfIn PDF document text
    • https://cdn.sqhk.co/depivuni/lWP3lie/photo_mix_app_download.pdfIn PDF document text
    • https://cdn.sqhk.co/pavujakorige/jghfie8/sofixakisipizega.pdfIn PDF document text
    • https://cdn.sqhk.co/nakusunegud/Niadii0/budabavaritili.pdfIn PDF document text
    • https://cdn.sqhk.co/jogibigeda/EBaidgd/9557159184.pdfIn PDF document text
    • https://cdn.sqhk.co/worupageke/jjHgehh/free_bollywood_movies_2020_online.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/xezonijida/adchoices_blocker_android.pdfIn PDF document text
    • http://rigutogivopum.epizy.com/96324980869.pdfIn PDF document text
    • http://refewebol.epizy.com/54168616702.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/jiragelinojo.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/empires_and_puzzles_guide_2019.pdfIn PDF document text
    • http://bumilamufitilu.epizy.com/ati_mobility_radeon_hd_4200_update.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/birthday_wishes_video_song_for_sister.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/59688717620.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_off0000c963.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC963 4960 bytes
SHA-256: 0a46694f336d66ac62ffe6ae0bb4745892bf27f05662c3745907d070c72bd556
font_01_sfnt_off0000da24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA24 10980 bytes
SHA-256: eb0ba5a6ced732de4b0a53eb52133af30cbdb6fd65f626fa26e7eba6853d5528

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