Malicious PDF — malware analysis report

Static analysis result for SHA-256 da017636f93a2a73…

MALICIOUS

PDF

77.1 KB Created: 2021-03-16 15:25:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 327cb54e5cb0d68fe448ec9d229c3478 SHA-1: 9d13b0df091d774e88a966c43fbe47701ad0810e SHA-256: da017636f93a2a7397e577bc26757a1a1def50dfa2a34ff60b3e05d46419c131
126 Risk Score

Malware Insights

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

The PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, many pointing to disposable domains and acting as a link farm, suggesting an attempt to distribute further malicious content or phish for information. The document body, though heavily obfuscated, appears to be a lure related to downloading a 'pokemon sword guide book pdf'. No scripts were extracted, but the overall structure and URL distribution are indicative of a malicious distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://soxebez.ru/wix?keyword=pokemon+sword+guide+book+pdf+download PDF link annotation
    • http://losopefopamusoz.sportsontheweb.net/67525224642.pdfIn PDF document text
    • http://maxobujixeweden.sportsontheweb.net/how_to_reset_schwinn_bike.pdfIn PDF document text
    • http://sugalomiwuto.getenjoyment.net/giboborazigenadowul.pdfIn PDF document text
    • http://nowojikowelox.iblogger.org/tsr_1109_city_of_splendors.pdfIn PDF document text
    • http://janafan.scienceontheweb.net/surah_baqarah_full_read.pdfIn PDF document text
    • http://fudoviwil.mywebcommunity.org/ruxejurifage.pdfIn PDF document text
    • http://xufededubumavif.scienceontheweb.net/boxakarobodago.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xumomevafuvozup.rf.gd/tamilrockers_telugu_movies_tamil_dubbed_free.pdfIn PDF document text
    • http://fenozenexow.epizy.com/xanathar_s_guide_to_everything_downtime_activities.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/wexafapinisakodogu.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/transfer_foil_sheets_for_nails.pdfIn PDF document text
    • http://benapubusepem.rf.gd/37877654060.pdfIn PDF document text
    • http://wifikip.rf.gd/39087273710.pdfIn PDF document text
    • https://s3.amazonaws.com/bofake/kevedadurigerakog.pdfIn PDF document text
    • https://b564fea6-732e-489f-a029-a72dc6590de2.filesusr.com/ugd/6a4619_948afc066b6d4957b3ec7b6d3e8c8164.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/3679261348.pdfIn PDF document text
    • https://8c56b32b-3398-45d6-9c0b-b55146621f16.filesusr.com/ugd/6924eb_5f616365059a4c7284804258c86152ce.pdf?index=trueIn PDF document text
    • http://bovuzigaratufob.rf.gd/20200000659.pdfIn PDF document text
    • http://kujojeg.rf.gd/how_much_does_a_pole_vault_pit_cost.pdfIn PDF document text
    • https://2c549fd3-bbcc-4e43-aea5-84609313cfd4.filesusr.com/ugd/c162b3_b303eeb3cd3a4fd9a55aba899b283a49.pdf?index=trueIn PDF document text
    • https://ca30e0e0-ecf2-44ab-b6a2-fe26291458be.filesusr.com/ugd/34e21e_0b7932f6102846d08dbca9f61ae34401.pdf?index=trueIn 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_off0000eb76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB76 5660 bytes
SHA-256: 17b7f76759db7fd6b58567cc6aecd22437c599f704a011c0e84a46a83dc28dc2
font_01_sfnt_off0000febd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBD 11660 bytes
SHA-256: 407cf829a5c29bed38ac464641757814d68c31e5bdce0ad8b475e860c3ead84d

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