Malicious PDF — malware analysis report

Static analysis result for SHA-256 85ea07777b78aea2…

MALICIOUS

PDF

76.0 KB Created: 2021-03-18 13:59:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 88531d70c2d3ad58d149bae18251e7df SHA-1: d5b46bcdc61ca95325d30ef5564d2c89929025ed SHA-256: 85ea07777b78aea2040a4f291f29ffe353bd9059a7404c8c911e0d03559add8b
146 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is a callback phishing lure, prompting users to call a phone number for customer service issues. The embedded URL and other extracted URLs point to suspicious domains, suggesting a phishing or scam campaign. While no scripts were explicitly extracted, the nature of the PDF and its embedded links strongly suggest an attempt to deceive the user into divulging information or initiating a fraudulent transaction.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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) or Microsoft license-boilerplate 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://zajinet.ru/wix?keyword=comcast+knoxville+customer+service+number PDF link annotation
    • http://kotuputepoworug.22web.org/mubajukufu.pdfIn PDF document text
    • http://arm-watch3.club/96237548252z5p06.pdfIn PDF document text
    • http://hookup750.website/xofapalenivsbv.pdfIn PDF document text
    • http://barodowo.iblogger.org/ruvirefaxijedovijepodizo.pdfIn PDF document text
    • http://goldstein.berlin/kefoxiwanelakonqqtee.pdfIn PDF document text
    • http://fiteduwad.22web.org/anaerobic_co-_digestion.pdfIn PDF document text
    • http://idealicait.site/beats_troubleshooting_wirelessxidbx.pdfIn PDF document text
    • http://wipalogazagak.22web.org/pagina_24_y_25_del_libro_de_historia_4_grado.pdfIn PDF document text
    • http://nevoxukuri.22web.org/how_to_know_what_kind_of_glasses_fit_your_face.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/590795bc-8278-4dc4-be29-74cc3b6e2035/78829292844.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/microsoft_word_tri_fold_pamphlet_template.pdfIn PDF document text
    • http://nuvofuniwurux.epizy.com/levosoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b4545d6-0e80-4d0b-baa9-e093fdf6fb66/tuzegegefizos.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/68758490845.pdfIn PDF document text
    • https://7404da97-7fcf-4d5f-9d5f-3f8644e6773a.filesusr.com/ugd/35f767_178fcad949144d4dad268a8a10b62abc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5497fc08-0232-4a5f-bd51-2014e603a486/simmons_sd5k_electronic_drum_kit.pdfIn PDF document text
    • http://gurifituzegotu.rf.gd/50764760838.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44c38562-26c0-4431-a5b9-ba935f91d097/sefidujeb.pdfIn PDF document text
    • https://5c90cfa9-af55-48e2-9430-1f3580382729.filesusr.com/ugd/e2b09b_e467f008c0b643ce931c576f663e1918.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/demography_and_population_studies.pdfIn PDF document text
    • http://wojudor.epizy.com/trans_siberian_orchestra_christmas_album_free.pdfIn PDF document text
    • https://b6de9e3f-c562-4e05-b5ee-70895c8060ae.filesusr.com/ugd/3801ff_c590b36b561c486f93f549b630b7ada1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/sorcery_apk_obb.pdfIn PDF document text
    • https://a5fc3680-5c08-4cda-bd6c-abaa3bdf25bc.filesusr.com/ugd/ea5d7b_fa6a8d9de61c40dfbf9140e29c90a7dc.pdf?index=trueIn PDF document text
    • http://woxenebifa.rf.gd/56703859632.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_off0000eb3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3B 5180 bytes
SHA-256: 5dab27e219a243dfadd742b2bcc6111a9797df11105d73075b2db4acdb10bc7b
font_01_sfnt_off0000fcc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC8 10868 bytes
SHA-256: 64096876c312e0209a6865bf3fe5f8b1c02074f740df6ea46e3769700ab537ac