Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dc47d76e2b1d61a…

MALICIOUS

PDF

78.7 KB Created: 2021-05-03 14:19:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: aadeab6370b6335a95f4ec3814d6e731 SHA-1: 8be8d2472ddc96aca713b76199efcc0f93ecff6b SHA-256: 2dc47d76e2b1d61a2b70a2ed77e28913e37c96a39e0bb2a929280a8337105536
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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. 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 0.9994

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 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.
  • 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://jacksth.ru/strik?utm_term=inteligencia+emocional+que+es+y+para+que+sirve PDF link annotation
    • http://sijixobepavip.22web.org/give_atleast_5_examples_of_figurative_language_and_their_meanings.pdfIn PDF document text
    • http://rovapiseve.22web.org/funny_words_of_wisdom_for_expecting_mothers.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/6fff1f66-9c97-460c-9476-1fa1efd38c2b/jeromewetidixosisewibajel.pdfIn PDF document text
    • http://suxaremulemafet.epizy.com/what_the_catholic_bible_says_about_tattoos.pdfIn PDF document text
    • http://mefufoseza.rf.gd/23466117509.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/xegigitunuzusedutenobag.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/43894083124.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f403f462-c823-451b-a45b-4dd7bc0b788f/nolaputigexu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bfd4988-d12d-46bd-9de3-2f554b2355c0/home_buying_for_dummies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4625bed8-fa08-400b-9523-9ff92f556fb8/sony_xplod_stereo_52wx4.pdfIn PDF document text
    • http://fanupola.epizy.com/parabola_graph_questions_and_answers.pdfIn PDF document text
    • http://jenikov.epizy.com/certificat_de_vente_vhicule_d_occasion.pdfIn PDF document text
    • https://245ae9ba-e923-43ed-bc11-30ed5d1acd78.filesusr.com/ugd/051519_b6663160260a4ea8affc9963da862c88.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rizezobabub/44656315719.pdfIn PDF document text
    • http://xoxitazowakovit.rf.gd/jesuvidasesibidinasemukog.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/40699230522.pdfIn PDF document text
    • http://ruzojonawa.epizy.com/34052556846.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/video_show_mod_apk_free.pdfIn PDF document text
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_defdac5596944d559ce480fb9d9bda6a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2045ed51-7061-4cc3-afe9-21dd542d247e/zogusebigijokajat.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/client_satisfaction_survey_templates.pdfIn PDF document text
    • http://xezeruv.epizy.com/giposarox.pdfIn PDF document text
    • https://s3.amazonaws.com/sojenozap/windows_server_2012_r2_supported_cipher_suites.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_off0000f45e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF45E 5476 bytes
SHA-256: 093fdc29bacc1f2b0c7d9217fc65d303fa9789b515fabc512bec71b28bdd4d1a
font_01_sfnt_off000106fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106FC 11760 bytes
SHA-256: 805df83e636cdeae935689c37e77fb2fb923328e3ab236884ca5b8c53bac5d44

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