Malicious PDF — malware analysis report

Static analysis result for SHA-256 a63a1515f1a0189f…

MALICIOUS

PDF

70.0 KB Created: 2021-03-03 16:56:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2f8a5cc8b253f50c1d6bfa035d7ad4bd SHA-1: 5d1fd605f30a471b8b7d9b1512c21f480329dfc2 SHA-256: a63a1515f1a0189fcc68f5dd791bbbc1b715bab4ff33bbe76b880009da981023
134 Risk Score

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://seumenha.ru/award?keyword=chinese+made+easy+textbook+4+pdf+free+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416144/normal_60128bd039c4d.pdfIn PDF document text
    • https://cdn.sqhk.co/talokelom/iZOahjI/nisewil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445531/normal_6008a02800221.pdfIn PDF document text
    • http://nunixofu.22web.org/54913805748.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374983/normal_60159b1983ef3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403681/normal_60251aa7c124e.pdfIn PDF document text
    • https://cdn.sqhk.co/vatomepipiw/fyRG2OK/time_jumpers_book_1.pdfIn PDF document text
    • http://netabemoli.22web.org/world_airline_rankings_2018.pdfIn PDF document text
    • https://fefokivaz.weebly.com/uploads/1/3/0/7/130776727/sujaxaxilosoje_nuxuj.pdfIn PDF document text
    • https://vuderuxedus.weebly.com/uploads/1/3/4/6/134692959/solaxasavawomuf.pdfIn PDF document text
    • https://pimefukidipobe.weebly.com/uploads/1/3/4/0/134096137/37f008.pdfIn PDF document text
    • https://pubotaxo.weebly.com/uploads/1/3/5/9/135962756/bawiferimaxupokuj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gupupofof.rf.gd/tamil_astrology_software_free_with_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/niwamazolipukuxisokotekif.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/fenapod.pdfIn PDF document text
    • http://xizuxevefup.rf.gd/motorola_model_mc9190_manual.pdfIn PDF document text
    • http://tititogejeda.rf.gd/xosojaduvewanadifo.pdfIn PDF document text
    • http://lixanixuzuki.rf.gd/c_programming_language_file_examples.pdfIn PDF document text
    • http://suxikikafib.epizy.com/lejuweguzix.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/kezijuxinabogosedipadufab.pdfIn PDF document text
    • http://ginodoto.epizy.com/suunto_vyper_air_battery_replacement_kit.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_off0000d421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD421 5740 bytes
SHA-256: f09d1f6b3c449c3b065a7730568d135a2cfe649596987132e70f3f279f08e6af
font_01_sfnt_off0000e799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE799 10156 bytes
SHA-256: 86dbfd28c8d70d6af099995ff15c3b7bed3ad1573f0249116f10bb41e7309482

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