Malicious PDF — malware analysis report

Static analysis result for SHA-256 734863b0a0c1dbac…

MALICIOUS

PDF

78.4 KB Created: 2021-04-04 11:16:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d47ca8a2a6e4244a26e60b001c6df31 SHA-1: 713cf468977a454e4bba22fd731dd62f4a72cd55 SHA-256: 734863b0a0c1dbac825d86192d79457dc26a88f53bb34f3527c6d7e740834f4d
104 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier as malicious. It contains a large number of external links, many of which point to potentially malicious domains, suggesting a link farm or SEO spamming operation. One of the extracted URLs, 'https://xezojetit.ru/award?keyword=amancio+ortega+book+pdf', is directly related to the document's apparent theme of 'Amancio Ortega book pdf', indicating a potential phishing or malware distribution lure. No scripts were extracted, but the PDF structure and numerous external links are indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://xezojetit.ru/award?keyword=amancio+ortega+book+pdf
    • https://zademufexek.weebly.com/uploads/1/3/4/7/134765537/b9c0a9783ab0.pdf
    • https://dowusezawidi.weebly.com/uploads/1/3/3/9/133997386/gesajiwujebe.pdf
    • https://xediziku.weebly.com/uploads/1/3/1/3/131384396/xedixe-sedusepe-pigufu.pdf
    • https://votarozoxanobo.weebly.com/uploads/1/3/4/3/134315144/4325311.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://belukamafanes.rf.gd/preo_do_cloridrato_de_metformina_500mg.pdf
    • https://s3.amazonaws.com/gogonof/56749657747.pdf
    • https://s3.amazonaws.com/likerajatob/tableau_desktop_activation_key_free.pdf
    • https://s3.amazonaws.com/jupoti/mouse_guard_rpg_2nd_edition_download.pdf
    • https://s3.amazonaws.com/kegubinefuda/blood_bowl_2_stadium_level_4.pdf
    • https://s3.amazonaws.com/fisulefajow/mabizajokibu.pdf
    • http://taruligewonuna.rf.gd/18441669665.pdf
    • https://s3.amazonaws.com/jusuberu/tezetup.pdf
    • https://ba85394b-11ac-4ca4-926b-74ca936c52e1.filesusr.com/ugd/5ccfc8_b107bb061d17498ba5a34b67a1f2420d.pdf?index=true
    • https://a52dd608-e7dd-4d50-8005-e0fd7a3896b4.filesusr.com/ugd/43d2fc_b96dadaf4ec944d8bc62cf447d5a6a40.pdf?index=true
    • http://wuxininozikup.rf.gd/converter_em_dwg_gratis_online.pdf
    • https://s3.amazonaws.com/pirosisob/taittiriya_upanishad_telugu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5a2.bin
9622c3963c475a9412e86fc474e00bdd39c44e84240ad951353796f7789d7c28		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A2 5460 bytes
font_01_sfnt_off0000f81b.bin
a38cb32e55b39b0597fe313203f3a58f16a829f05ad3915259d4ef4f9785ba19		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF81B 16456 bytes

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