Malicious PDF — malware analysis report

Static analysis result for SHA-256 55f64e0bb3ce189f…

MALICIOUS

PDF

95.9 KB Created: 2021-03-20 23:08:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: cffc7e9bc2710836f5fe3f9224f4e9c3 SHA-1: 506b85f29c7e9c7164032c3f68eae84fd0de1243 SHA-256: 55f64e0bb3ce189f1f5538b777d689ea38565ea1e0f01ef805d5d5a1af8ebd43
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged as a link farm on disposable hosting, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is malicious, likely a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to exploit users via malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://seumenha.ru/wix?keyword=how+to+find+fuel+starbound PDF link annotation
    • http://telukobipafe.iblogger.org/masinuneduwavidos.pdfIn PDF document text
    • https://cdn.sqhk.co/futidiwe/7iigjhj/sad_piano_melody_midi.pdfIn PDF document text
    • https://cdn.sqhk.co/xonoguduzob/GgfcJib/kopuwisex.pdfIn PDF document text
    • https://cdn.sqhk.co/pubodegosog/bzhj2cV/51899391597.pdfIn PDF document text
    • https://cdn.sqhk.co/pafatewodoju/AAvEFge/69924210539.pdfIn PDF document text
    • https://cdn.sqhk.co/ledivure/cF6jgIF/zobivizigaj.pdfIn PDF document text
    • http://topfrag.rip/nepali_puti_ko_photofpnv9.pdfIn PDF document text
    • http://curvepreloved.com/amoeba_sisters_video_recap_alleles_and_genes_answer_keyigu6b.pdfIn PDF document text
    • https://cdn.sqhk.co/jusulikipe/g1FhiU3/28674065467.pdfIn PDF document text
    • http://dosutomek.iblogger.org/kinirijawadosazudenorane.pdfIn PDF document text
    • http://wowitaly.pro/gikogibuxamock45.pdfIn PDF document text
    • https://cdn.sqhk.co/pitekofotada/iijgjjJ/barber_hair_salon_hair_styling_games_3d_online.pdfIn PDF document text
    • http://wordsideget.top/what_does_it_mean_to_be_charged_with_contemptv9b6z.pdfIn PDF document text
    • https://cdn.sqhk.co/rizakumer/Aifpghi/download_border_light_led_color_live_wallpaper.pdfIn PDF document text
    • http://xinupavob.iblogger.org/binixirejusororup.pdfIn PDF document text
    • https://cdn.sqhk.co/rozopebak/ibjaUzf/fagav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zakunafu/liwinoli.pdfIn PDF document text
    • http://xivoxek.epizy.com/75261020186.pdfIn PDF document text
    • http://gopudagob.epizy.com/call_internet_free.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/convertir_gramos_litro_a_miligramos_decilitro.pdfIn PDF document text
    • http://jefelaxe.epizy.com/bloodline_ariana_grande_piano_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/manual_correo_monetria_justia_federal.pdfIn PDF document text
    • http://sinamupom.epizy.com/46130420551.pdfIn PDF document text
    • https://s3.amazonaws.com/xefezesebusu/57765828258.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_off00012daa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DAA 4976 bytes
SHA-256: 18b14d517933cea873da7aa373762ed77c88bd27ec72def710659272611f1601
font_01_sfnt_off00013eaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EAA 11324 bytes
SHA-256: 281edc1696fe63e52e609fb52385a19c1bd759d5100eb7ae49d61149c35968a2
font_02_sfnt_off000163d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163D5 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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