Malicious PDF — malware analysis report

Static analysis result for SHA-256 0af4646badf67f7a…

MALICIOUS

PDF

76.2 KB Created: 2021-02-24 03:42:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 506565ef266d62e0daea36fb768eca61 SHA-1: 58428514febed81a1173c1507cd903e236929528 SHA-256: 0af4646badf67f7aa4ab67c8cec4053634f17e9abf579440366eabeac7685f1b
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to direct the user to a harmful site. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a phishing or malware delivery scheme.

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://yafferge.ru/wb?keyword=rheem%20tankless%20water%20heater%20wiring%20diagram In PDF document text
    • http://mjawebdesign.net/209203444256llbu.pdfIn PDF document text
    • http://tugrull.com/research_methods_for_the_behavioral_sciences_6th_edition_freeufchc.pdfIn PDF document text
    • http://instasale.company/aventuras_4th_edition_access_codepi8gr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/wutogugej/smc_pneumatic_cylinder_3d_model.pdfIn PDF document text
    • https://s3.amazonaws.com/pomaxa/adding_fractions_with_same_denominator_worksheet_tes.pdfIn PDF document text
    • https://s3.amazonaws.com/davubewu/what_lies_beneath_movie_480p.pdfIn PDF document text
    • https://s3.amazonaws.com/kozibowisenatu/1672172730.pdfIn PDF document text
    • http://nimokum.rf.gd/tozoxep.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/burger_king_crispy_chicken_sandwich_carbs.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/helter_skelter_manson_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/27942119671.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/red_footed_tortoise_diet_sheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9C 5080 bytes
SHA-256: 06af7484a00d11a0e41efd6d6c9ae348982a65304409709385d03eb4bb4a1d30
font_01_sfnt_off0000f0bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BF 10840 bytes
SHA-256: e1aa674a8adefd0db253eeac89fcaeb1309c3a447d1a3369c803cf692a731f06
font_02_sfnt_off000115d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D0 4324 bytes
SHA-256: 8405bb6ca9a6fb718a2e910e1cdde4d74ac2122cab0061dc5f772322db9c7ccd

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