Malicious PDF — malware analysis report

Static analysis result for SHA-256 b934e62e0dbdc6ae…

MALICIOUS

PDF

78.3 KB Created: 2021-03-25 15:09:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0a5905d6efe24f05a3870570f1360c62 SHA-1: 21d84b308ec8c38e28c6bd773ad9500e716dafa3 SHA-256: b934e62e0dbdc6aedf0bb90628d72d204b0d7b3d7bc75818c43b80102ee5e257
176 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 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.
  • 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://kuzutuzo.ru/wix?keyword=rhode+island+judiciary+home+page PDF link annotation
    • http://porn77.design/499550821015faqi.pdfIn PDF document text
    • http://mkr-olimp.info/74564781228uya94.pdfIn PDF document text
    • http://rgtuitp.ru/journey_to_the_west_fish_out_of_water_full_moviezw245.pdfIn PDF document text
    • https://cdn.sqhk.co/nemuvefik/nphhe1h/mubenerekurevu.pdfIn PDF document text
    • https://cdn.sqhk.co/sevigexew/jhdghjd/35690253687.pdfIn PDF document text
    • http://hamsterbig.com/boxejemewekire15vn9.pdfIn PDF document text
    • http://simopuvoramawu.mywebcommunity.org/19802424651.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzetuzame/9wEh0TS/disneyland_paris_map_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/woxemumi/bJMjnge/youtube_rocketman_movie_soundtrack.pdfIn PDF document text
    • http://vogolimipogusoz.mypressonline.com/50814523920.pdfIn PDF document text
    • http://krym.today/herpes_simplex_virus_2_vaccine40h1j.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6d251753-49d0-4f5b-a278-10ed1cacc9d0.filesusr.com/ugd/5c139a_7917cd518bc04b95af062853198e7517.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/background_eraser_app.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/scotsman_ice_machine_cleaning_youtube.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/what_is_carl_jung_personality_theory.pdfIn PDF document text
    • https://5e0c4d4d-41f9-428c-9564-b93e7cff6769.filesusr.com/ugd/510691_daba3b25349d42be8b12493ab739e878.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/falufusu/kerekaropite.pdfIn PDF document text
    • https://748e6e98-33e2-4bd1-95aa-01ea3505a154.filesusr.com/ugd/704f6c_b9b01699ef0e4647a746a31aed846883.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/dewalt_pressure_washer_instruction_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/carboxylic_acid_to_amide_chemguide.pdfIn PDF document text
    • http://madepadejatutof.onlinewebshop.net/action_research_in_marathi.pdfIn PDF document text
    • https://21c505bb-01ca-4817-a549-4ed1ebba5040.filesusr.com/ugd/7d7105_b603daf8e7f648038a7e07822a58d502.pdf?index=trueIn PDF document text
    • http://mojenuj.atwebpages.com/xefasoxakugu.pdfIn PDF document text
    • https://0aa989e7-076c-475f-bc22-fff5ae310860.filesusr.com/ugd/b44be6_a3a483f9d2c74a3b80fc5a26a9b6ea3f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tudawufed/ansys_cfd_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/chevrolet_trax_2017_manual.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_off0000f271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF271 5672 bytes
SHA-256: b40d4b5a12d719b960639d5c2eda0308d33bc85733d8553fb3282b4892fba113
font_01_sfnt_off000105a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A6 11132 bytes
SHA-256: e53b7ff549af47f0ed3c651158d9a097dddfed6c89c04e054701b9bd4ca3cc99

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