Malicious PDF — malware analysis report

Static analysis result for SHA-256 85e26a84cc8cb47d…

MALICIOUS

PDF

87.0 KB Created: 2021-03-29 09:16:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 5e032e3977bc4b2787717259c1b91410 SHA-1: 6d342729db4a1251bc0c6ef831c1ab2a4ad04311 SHA-256: 85e26a84cc8cb47de5c9746007d16affa72c5481b16947aebe5f0a716c790623
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains heuristics indicating it's a link farm and a callback phishing lure, suggesting a malicious intent to redirect users. The ML classifier and ClamAV detection strongly support this assessment. The embedded URL points to a domain associated with phishing activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://ponafet.ru/wix?keyword=civilization+5+guide+to+war PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4383915/normal_60185d11cd9e0.pdfIn PDF document text
    • http://kuliwajijet.22web.org/sony_mex_n5000bt_how_to_connect_bluetooth.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449618/normal_6037148dd20ca.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380674/normal_5ff01511979d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385620/normal_60098ea6e51fc.pdfIn PDF document text
    • http://gojodefigogizib.iblogger.org/18701636011.pdfIn PDF document text
    • http://zagafesujed.iblogger.org/39408160275.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/america_history_of_our_nation_online_textbook.pdfIn PDF document text
    • http://bunakakivukutus.epizy.com/cadre_photo_mural_grand_format.pdfIn PDF document text
    • http://zofigofaka.epizy.com/bonfire_childish_gambino_free.pdfIn PDF document text
    • http://magivaxinel.rf.gd/goods_inward_inspection_report.pdfIn PDF document text
    • https://88749095-6fd7-453f-8e8a-15b48fe47dd1.filesusr.com/ugd/e4d7df_3ac8f07ae79243189d868f6e9f674e46.pdf?index=trueIn PDF document text
    • http://jasisogurajis.rf.gd/baka_to_test_light_novel.pdfIn PDF document text
    • https://6e7ef639-f89a-4701-86f9-710a836f1183.filesusr.com/ugd/12745a_3607c462110847c3ae0dcf5c12d8171d.pdf?index=trueIn PDF document text
    • http://femasusatatovet.epizy.com/zixojajuwiwun.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/jakisoramipapi.pdfIn PDF document text
    • https://s3.amazonaws.com/lazolu/gemukelijo.pdfIn PDF document text
    • http://vipujaxetixise.epizy.com/battery_management_system_lithium_ion.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/sword_art_online_2_anime_review.pdfIn PDF document text
    • https://de315c38-daa2-4293-b666-e554ba9b7d65.filesusr.com/ugd/564d2e_dd15dc7d5cd140d09822e25cd4e6bde1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/buvamefojebijonopolujuve.pdfIn PDF document text
    • http://paxiludewajed.epizy.com/risobikatovibede.pdfIn PDF document text
    • http://fezisiw.epizy.com/buxotarisozozokeruz.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_off00011673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11673 5048 bytes
SHA-256: db6a777cf9702dd2fdffffd329e126a98e1715ad2fe9b6ce42c79d8b95769af9
font_01_sfnt_off000127c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127C8 11508 bytes
SHA-256: 9c64ae9ff30957b74078d5e49c4a970bacac346a42447cbfcdf6b4c519aa7d22

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