Malicious PDF — malware analysis report

Static analysis result for SHA-256 77e44fa19780920e…

MALICIOUS

PDF

86.7 KB Created: 2021-03-23 17:03:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f75bf68f06d4d09c7e276f4fb6e5f2a2 SHA-1: 712030c27df3baa8f612f2a844599e32cdffd990 SHA-256: 77e44fa19780920ec55c8b3e39464a33234d8962748b659c61533d977b48110e
134 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting an attempt to redirect users to malicious sites. The document body, though heavily obfuscated, contains keywords related to product searches, which may be used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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.
  • 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://nipisod.ru/wix?keyword=fringe+2+piece+bathing+suits+with+skirts
    • http://veruvipavopa.getenjoyment.net/assets_and_liabilities_definition.pdf
    • http://rapaliku.iblogger.org/vivadipi.pdf
    • http://zeropium.com/56122912352u1v78.pdf
    • https://selokifasafu.weebly.com/uploads/1/3/4/3/134383977/ef8f68f9c2fd.pdf
    • https://zofumevovuve.weebly.com/uploads/1/3/0/8/130874077/wosunefowanurox.pdf
    • http://bimovixexena.scienceontheweb.net/longman_preparation_course_toefl_paper_test.pdf
    • http://milanbeach.fun/niloxininedepxftv.pdf
    • http://wedidizelajat.mypressonline.com/82859113301.pdf
    • http://vodabutopidaru.getenjoyment.net/lenemadowenaviwijik.pdf
    • https://napifilimikap.weebly.com/uploads/1/3/1/6/131606974/sarefun.pdf
    • http://santand-es.com/flower_of_life_tattoo_forearmu4th4.pdf
    • http://wusokamojifel.scienceontheweb.net/when_did_pokemon_red_and_green_come_out.pdf
    • https://wawodupalise.weebly.com/uploads/1/3/4/6/134621762/gepufagubufetuv.pdf
    • https://mafeguviwu.weebly.com/uploads/1/3/1/4/131407057/gupunigovakujosum.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://sajomapujozokux.onlinewebshop.net/yamaha_rx-v663_manual.pdf
    • https://uploads.strikinglycdn.com/files/53f77c0f-18b2-47ba-a7a5-b743c1222e19/why_is_finland_the_best_education_system_in_the_world.pdf
    • https://uploads.strikinglycdn.com/files/758f89f8-2a5c-4122-9067-2cc5a6c5d6b0/begadipawuditivu.pdf
    • https://uploads.strikinglycdn.com/files/53d5a4fd-8bd2-469e-9ad5-b0e60547bdf0/kitchenaid_artisan_ksm160_stand_mixer_white.pdf
    • http://lesigoviweti.epizy.com/vagurozawanizosixixa.pdf
    • http://gaxilitexu.onlinewebshop.net/23931571764.pdf
    • http://xirofapinowud.atwebpages.com/97998520912.pdf
    • http://kilisajafe.rf.gd/27659686126.pdf
    • http://vupafigimewex.rf.gd/minecraft_apk_pc_windows_7_free.pdf
    • http://jajogagek.atwebpages.com/27673319809.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f123.bin
a31aedb3fe800cd2b5c0120397ec9570e12c7cc97febb81e3d6171160c50e6bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF123 2960 bytes
font_01_sfnt_off0000fba5.bin
4dae524668561b62794734cb3ed5b82fd95fc87673af9c3a609d34c8762568fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA5 5544 bytes
font_02_sfnt_off00010e9c.bin
82c85fdbc3efcbf9f40790748e1a4893bca8aa9bd4152bb1b850068512ca47bf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9C 11956 bytes
font_03_sfnt_off00013663.bin
4a863e6a100f06cc9671f0e69588b6864d8ad8d1553f7ff9d77ad28ed429bcdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13663 16340 bytes

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