Malicious PDF — malware analysis report

Static analysis result for SHA-256 321b0159322851a7…

MALICIOUS

PDF

73.2 KB Created: 2021-02-23 08:27:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5bef83bf821a9f71731589dfb38799f4 SHA-1: 8314b67d4b95f237396673fd913f5d6abb18ce05 SHA-256: 321b0159322851a74cbf1e39bc66391bee3d659c8eca5f29a387ea8884fa0f56
66 Risk Score

Malware Insights

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

The PDF file contains multiple embedded URLs, many of which point to disposable hosting services and are flagged as link farms. The ML classifier strongly indicates maliciousness. The document body, though heavily obfuscated, suggests a lure related to 'html and css projects free download', aligning with a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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/wb?keyword=html%20and%20css%20projects%20free%20download PDF link annotation
    • https://vafukomoruf.weebly.com/uploads/1/3/4/8/134862603/benemum.pdfIn PDF document text
    • https://pelozaxuji.weebly.com/uploads/1/3/2/6/132680784/4aba385ef3.pdfIn PDF document text
    • https://cdn.sqhk.co/lubigegek/bijghvr/navutexaxewubif.pdfIn PDF document text
    • https://wisolowiguwo.weebly.com/uploads/1/3/4/6/134630140/1150339.pdfIn PDF document text
    • https://cdn.sqhk.co/zimuteraf/NUjbgc8/orange_tree_for_sale_texas.pdfIn PDF document text
    • http://xasuxugadivusug.22web.org/42695464613.pdfIn PDF document text
    • http://citimart.online/wesiregufexaxawerubv0k1s.pdfIn PDF document text
    • https://cdn.sqhk.co/jigavozef/jji7haJ/minecraft_new_ores_mod_1._16._3.pdfIn PDF document text
    • https://cdn.sqhk.co/vodadavubex/WghhfQ1/vuvigepibopilagatelitine.pdfIn PDF document text
    • https://cdn.sqhk.co/jorisuzil/cnBahfC/wyze_cam_pan_outdoor_cover.pdfIn PDF document text
    • http://dematovaxitak.22web.org/84050709534.pdfIn PDF document text
    • http://pafekusiwajida.66ghz.com/9577285119.pdfIn PDF document text
    • http://blog-uniswap.org/novofatavugcc.pdfIn PDF document text
    • http://tekaxaxiwirika.iblogger.org/the_crown_season_4_episode_3_reddit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wadogoded.epizy.com/levozixudiwosewejosefaz.pdfIn PDF document text
    • http://bolutiso.epizy.com/21985904409.pdfIn PDF document text
    • http://xofivijisaja.rf.gd/xafitutukigefamat.pdfIn PDF document text
    • http://zamoguwudegovo.rf.gd/broken_april_ismail_kadare.pdfIn PDF document text
    • http://xasiruzate.rf.gd/ao_smith_gas_reset_button.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_off0000de41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE41 5428 bytes
SHA-256: 68002b64f7838fa6e23dee42aed0c0b7d2e0bcc35afa7f7c2d3d783459f6d856
font_01_sfnt_off0000f0b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B2 11372 bytes
SHA-256: 85eac2724af3f62f287a860cbbbe04280f8734684366221262ae7a3de5aa6b4f

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