Malicious PDF — malware analysis report

Static analysis result for SHA-256 40e1472c27664349…

MALICIOUS

PDF

80.7 KB Created: 2021-03-29 13:26:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 557ac3838fdfd560f19f2643f9a17054 SHA-1: 57431019fd47a9b16edd75b6ac5e5eb6fc02e337 SHA-256: 40e1472c276643496c5a1ad565047ac096c727cb849a67efee9bf24ec8aacc8a
154 Risk Score

Malware Insights

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

The file is identified as malicious by multiple heuristics, including a critical alert for linking to known malicious redirector infrastructure. The embedded URL `https://crophysi.ru/wix?keyword=the+earth+through+time+11th+edition+pdf` is a primary indicator of this malicious activity. While no scripts were explicitly extracted, the PDF structure and the presence of malicious links strongly suggest an attempt to redirect the user to a harmful site, aligning with phishing or malware delivery tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/wix?keyword=the+earth+through+time+11th+edition+pdf In PDF document text
    • http://starkrobotics.org/capstone_homes_delaware6ru82.pdfIn PDF document text
    • http://koprovk.xyz/how_to_use_a_thermostat_efficiently5rmiv.pdfIn PDF document text
    • http://jepegupunu.mygamesonline.org/wukikokifirepuzovoj.pdfIn PDF document text
    • http://delayikapy.xyz/free_printable_coloring_map_of_the_worldwyk7a.pdfIn PDF document text
    • http://metazoaapc.fun/vowuwogizemudofasuzk1qat.pdfIn PDF document text
    • http://leaninrzpd.site/zonebuli2j3ie.pdfIn PDF document text
    • http://najetaxu.mygamesonline.org/mind_power_exercises.pdfIn PDF document text
    • http://tumuduwaju.mypressonline.com/17244405458.pdfIn PDF document text
    • http://decideyouself.fun/octopus_squid_and_cuttlefish_poster6vbly.pdfIn PDF document text
    • http://podcard2020.site/mixowewilumuxuvs7xe.pdfIn PDF document text
    • http://zoom-omsk.ru/rawiwitozasa5sl8m.pdfIn PDF document text
    • http://jawixogu.mygamesonline.org/14963424706.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
    • http://wilosokanik.myartsonline.com/basics_of_computer_programming_languages.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/20659958511.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/nasonusulal.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/takerujatemax.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/98390888703.pdfIn PDF document text
    • http://vobikeretuwof.atwebpages.com/difference_between_associate_system_engineer_and_software_engineer.pdfIn PDF document text
    • http://kopolug.myartsonline.com/wipijavokugar.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/57358467861.pdfIn PDF document text
    • http://soxarigur.myartsonline.com/coronado_island_map.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/horse_pumpkin_template.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_off0000f035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF035 5128 bytes
SHA-256: 2f6952704a81eedfd0ce49df81e085db02b5828af397bc694f90e0de1054933b
font_01_sfnt_off0001018d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018D 11392 bytes
SHA-256: 64d7ca88ee2efc625c465de8857669756d6bd88b4ca4da7414f499fe0926576d
font_02_sfnt_off00012847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12847 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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