Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcac7e18e3785746…

MALICIOUS

PDF

83.0 KB Created: 2021-03-14 00:08:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: bab14546714850e6d9036b67c4464b4f SHA-1: 7d78e1d08ff402a16a3a9426a22c5ca189a4d9d9 SHA-256: dcac7e18e3785746f6a85949c5fbe06ecac493280306b919d3bbcfd1ef01ebcd
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though heavily obfuscated, suggests a lure related to a "bowling ball buyers guide". The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution via the embedded URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=bowling+ball+buyers+guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4470409/normal_6034a26588c04.pdfIn PDF document text
    • https://cdn.sqhk.co/bafesugoguwi/hBHiieo/netobafewikotikixo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464055/normal_6045e2a1f2d53.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451025/normal_5fca076407647.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369900/normal_6015b22f4a014.pdfIn PDF document text
    • http://punevufazeji.iblogger.org/guvuvemadorobefezibuku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377656/normal_601972f6b9e02.pdfIn PDF document text
    • https://cdn.sqhk.co/rikopekela/jj5UghZ/68086050130.pdfIn PDF document text
    • https://cdn.sqhk.co/xumesapaxoku/xwLheii/18186907149.pdfIn PDF document text
    • http://rogofede.22web.org/35551072958.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gitipelut/apache_spark_s_page.pdfIn PDF document text
    • http://katurew.epizy.com/naxinudotujexejon.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/android_root_software_without_computer.pdfIn PDF document text
    • https://e33362eb-94ba-4427-a888-6f4863169a18.filesusr.com/ugd/36ce96_b60cb599d1024adc94ed3b31089d34f9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sajezife/d_d_5e_best_wizard_guide.pdfIn PDF document text
    • https://ba10d46a-d7c1-43af-8542-f1a50f31aa8a.filesusr.com/ugd/4dded2_e9cd78879ebd4b4691de1d171e9c7a63.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vuxirefare/13903533755.pdfIn PDF document text
    • http://zipaluzit.rf.gd/garnet_hill_cotton_percale_sheets.pdfIn PDF document text
    • http://gexegufikide.epizy.com/a4988_driver_datasheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c4f641a-b92b-47b8-87a6-96326eadec3b/dupavimipifitofif.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/beintehaa_serial_song_free.pdfIn PDF document text
    • https://19aaccd0-9772-41b6-85c4-be118606641a.filesusr.com/ugd/a12125_77aebd1b749946729517b7ac3a1d1e7b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/32476ef9-48ed-4bd2-b7c5-846ef2d8f5bc/how_to_reset_moto_g5_to_factory_settings.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB6 5376 bytes
SHA-256: 7fad7308d654c28f36675743ce56ae48941bc1eb2dfcab40b8851f901b44ecbf
font_01_sfnt_off0001021f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1021F 10764 bytes
SHA-256: b9fd2deaf429d7bbb3d033aaee2639f8d363bdd99d420b1ee948800d78f337e5
font_02_sfnt_off00012730.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12730 16204 bytes
SHA-256: 31aa257675234f953cb39254c73a0c002637764ec2691c470e0912636c3685cf

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