Malicious PDF — malware analysis report

Static analysis result for SHA-256 50f9328a95e483d6…

MALICIOUS

PDF

78.6 KB Created: 2021-03-10 22:41:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 5f9600ffce688fca261cb3caed7191b2 SHA-1: 1fff77b52ab8d5553ea0cf788ecd4c0fb61c80b3 SHA-256: 50f9328a95e483d68ddd2cf167fc8e61343d9f4219ff078785fcce81087a8f6e
134 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ML classifiers and ClamAV as malicious phishing content. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm designed to host many PDFs, suggesting a campaign to distribute malicious content or phish users. The presence of a download button lure further supports the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://botokaw.ru/wix?keyword=movie+download+sites+bollywood PDF link annotation
    • https://muwegegedagus.weebly.com/uploads/1/3/0/7/130738526/5558300.pdfIn PDF document text
    • http://kawolamekepe.22web.org/11412812421.pdfIn PDF document text
    • http://wujejejifi.mygamesonline.org/why_does_dna_have_thymine_and_rna_have_uracil.pdfIn PDF document text
    • https://jaluzirilunotu.weebly.com/uploads/1/3/2/6/132681851/debizudivaxugol_rilabegil.pdfIn PDF document text
    • http://widevuvi.22web.org/isobars_and_isotherms_worksheet.pdfIn PDF document text
    • https://dojibabebane.weebly.com/uploads/1/3/2/6/132682208/dinanaj.pdfIn PDF document text
    • http://fizasibako.22web.org/79924339056.pdfIn PDF document text
    • http://budokudepa.scienceontheweb.net/jemuruxape.pdfIn PDF document text
    • http://movizopolu.medianewsonline.com/pefafikekixutavufajojeb.pdfIn PDF document text
    • http://zipibafof.iblogger.org/6781467772.pdfIn PDF document text
    • https://bewevirat.weebly.com/uploads/1/3/1/4/131437926/wepidusoses_wulinituvus.pdfIn PDF document text
    • http://towufato.mywebcommunity.org/how_much_do_attorneys_make_in_new_york.pdfIn PDF document text
    • http://vulomufukuvi.22web.org/93331515559.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kokalukavevip.epizy.com/batixitepeja.pdfIn PDF document text
    • http://guwuwusiva.rf.gd/23440082699.pdfIn PDF document text
    • http://jalasofumikom.rf.gd/34415230451.pdfIn PDF document text
    • http://suduxegowur.onlinewebshop.net/where_to_travel_2020_lonely_planet.pdfIn PDF document text
    • http://vimixof.onlinewebshop.net/dymo_d1_durable_label_tape_12mm_white_on_black.pdfIn PDF document text
    • http://xirexadugimog.atwebpages.com/stock_market_holidays_2021_india_nse.pdfIn PDF document text
    • http://fokamosidiwu.rf.gd/10th_result_2020_hbse_download.pdfIn PDF document text
    • http://jejotatimub.rf.gd/artritis_reumatoide_pediatria.pdfIn PDF document text
    • http://fatowulur.epizy.com/57546092047.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_off0000f781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF781 5124 bytes
SHA-256: a1c2e8c1fcbba6ce895fcf3c12b4462b1adc0987c225672f72db6b2d629ff927
font_01_sfnt_off00010924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10924 10428 bytes
SHA-256: daffd1564c3af24b3f1f81537260ab6745a4105c691cd0a51dfdd074f05600df

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