Malicious PDF — malware analysis report

Static analysis result for SHA-256 c00f7a847e64f75d…

MALICIOUS

PDF

92.4 KB Created: 2021-07-04 16:47:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aea22f8336b496850824c8b8397ed069 SHA-1: 17a7df78744c1ad9a6c9c57758df99dedbbc949c SHA-256: c00f7a847e64f75d53e5dea88b98319e225d690fdb38738f33a3f1d82c5c3a3b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan payload. It contains a link farm pointing to compromised WordPress sites, likely serving as a distribution point for further malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to exploit vulnerabilities or trick users into downloading malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce20af92e8b---jumekoziduzupebaxizewuw.pdf
    • http://munnarinfo.in/userfiles/file/dokuwebezulexufapojutolok.pdf
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4213b4bd8---36955450325.pdf
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607cfc8dd6c69---roxiwi.pdf
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/a2ef96366565ea54968e3c3b8e5455b8/74441302268.pdf
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c03310420fd---bigijalef.pdf
    • http://leebyunghun.org/new/upload/board/files/jonevifiwowura.pdf
    • http://pogservice.ru/userfiles/file/xarixabujime.pdf
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae2b3dbf9c3---dawoge.pdf
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607177db80665---69379629222.pdf
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609766f139653---xebekuvunetupusiti.pdf
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ac535d7c452---guwebimezilebidibumavuz.pdf
    • https://fourseasons.events/wp-content/plugins/super-forms/uploads/php/files/3bd852819ba8031f72e8c59fa15de293/41784985623.pdf
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8b2113e7d---sonozakupuzim.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607bfd1e153c9---junap.pdf
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a8abac1b28e---58092861411.pdf
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/d23plcnb20ueatuu3dkqgkt12q/faferu.pdf
    • http://reicar.dk/userfiles/file/jogufizimujowabixatezo.pdf
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/0edfac5f4d093e74f8477ae591de1a53/94700761143.pdf
    • http://upbfassadenbau.com/upload/file/tasidugotexesu.pdf
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/77898092332.pdf
    • http://reanda.com/jingkelun/userfiles/files/20210617072810.pdf
    • http://mygotour.com/FileData/ckfinder/files/20210530_570CF45A7E103F88.pdf
    • https://codecs.roimages/file/19242252952.pdf
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a178965fa75---tasutakolobuvivog.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=building+for+minecraft+pro+apk
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df1d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF1D 16792 bytes
font_01_sfnt_off0000f72e.bin
9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd
pdf-font-stream PDF embedded font (sfnt) at offset 0xF72E 16092 bytes
font_02_sfnt_off00010c6f.bin
90b216ac5b60c5b20eb2b8957c762772a8290f976c0eaf4d23616ee4d97a27fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C6F 21120 bytes
font_03_sfnt_off0001419b.bin
6df00093d1a1fd8b8f95901b42ba2863538c90606311dd4adf1993a433792d13
pdf-font-stream PDF embedded font (sfnt) at offset 0x1419B 1692 bytes
font_04_sfnt_off000149a4.bin
496e854f12b3e0042452b2951524da9fc9dda96187726fb7d7ea837a47d45ff0
pdf-font-stream PDF embedded font (sfnt) at offset 0x149A4 11040 bytes