Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2d471fa41242b20…

MALICIOUS

PDF

71.9 KB Created: 2021-03-17 13:50:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 04660e72e817235ae72e1908e4c606ab SHA-1: 1b937b0bc6b4e9864d1a60293a17bf8d40d2463b SHA-256: c2d471fa41242b20af24bf2baaa07eade72da2872c44064c68e710f490eda193
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://crophysi.ru/123?utm_term=666+alarma+song+free'. This indicates the document's primary purpose is to lure the user to a potentially harmful external site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of a malicious URL within the document body strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/123?utm_term=666+alarma+song+free In PDF document text
    • http://supariwepexafat.mywebcommunity.org/6854639919.pdfIn PDF document text
    • http://mitisavad.getenjoyment.net/shimano_xt_di2_groupset_price.pdfIn PDF document text
    • http://nevinidonet.mywebcommunity.org/5th_edition_character_sheet_apk_premium.pdfIn PDF document text
    • http://tuvivukaroj.mygamesonline.org/the_secret_life_of_the_american_teenager_season_4_ep_6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jalijoruki.atwebpages.com/79694796261.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/adobe_air_32.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/zupavaze.pdfIn PDF document text
    • http://dugukob.rf.gd/color_code_branding_identity.pdfIn PDF document text
    • http://widusop.atwebpages.com/69074641428.pdfIn PDF document text
    • https://s3.amazonaws.com/dixaleko/jofijewajiwolenitud.pdfIn PDF document text
    • http://watusatuvor.myartsonline.com/23004744659.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/john_deere_gx345.pdfIn PDF document text
    • http://reduxaxu.epizy.com/sweet_dreams_episode_10.pdfIn PDF document text
    • http://notaruk.rf.gd/reference_page_for_job_template.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/nopovurajakikijowi.pdfIn PDF document text
    • http://jisunopesaluzi.atwebpages.com/elements_of_computer_programming.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/pack_n_play_mattress_cover.pdfIn PDF document text
    • http://miweduxaso.rf.gd/alejandra_pizarnik_cartas.pdfIn PDF document text
    • http://momobolabewonu.epizy.com/gonegexe.pdfIn PDF document text
    • http://lawaxisagiwog.atwebpages.com/54299233240.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_off0000d824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD824 5144 bytes
SHA-256: 22690cfcf923b66f80924a4c1494da64a9e527ec7b5fb5aba4c8f6187a40611b
font_01_sfnt_off0000e98a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98A 11696 bytes
SHA-256: 3821347bb29eebf950c82b95131c1f7def6183e7a307b4e06996d6618acc368c

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