Malicious PDF — malware analysis report

Static analysis result for SHA-256 baa30856e540c42e…

MALICIOUS

PDF

95.2 KB Created: 2021-07-07 02:42:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: c0c65d083365bd2c9459a2d8ca052684 SHA-1: 2d0db24c2ebe98ef8a5618f02fb8a5562676389c SHA-256: baa30856e540c42ea55038ed4ad3c6a70586ae55e114660d9c19ef5c9841452a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many hosted on compromised WordPress sites or disposable domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. 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 https://medvor.ru/uplcv?utm_term=creational+patterns+in+java PDF link annotation
    • http://imailbox.nl/images/uploadedimages/file/38866412329.pdfIn PDF document text
    • http://thehawthornnyc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608df72a3f59c---vivofetezimum.pdfIn PDF document text
    • http://flomojapan.com/upload/files/funofabufozej.pdfIn PDF document text
    • http://joyearland.com/ckfinder/userfiles/files/41232876394.pdfIn PDF document text
    • https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/ekj08g5tnq6149d9r6ilerbc8v/jutanuwibabeneluvalubabew.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/21161148955.pdfIn PDF document text
    • http://project-lovcen.me/userfiles/file/tapevadisozaruvekuxebo.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/1607d033370c7e---xikugepuwusadud.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/16089bab631ca8---mofasawamapitugowaguzitof.pdfIn PDF document text
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af9921ed2dc---12524819774.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609e23144feef---juruzogiwatitujokibogup.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/7gmfpv6qacj3h00phi7teroe4s/bagabuvu.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b2124726444---3467806916.pdfIn PDF document text
    • http://edsmithestate.com/clients/8/8f/8fcea3baa00381bb68ca4dcda22eb4c7/File/lawuzawawutovot.pdfIn PDF document text
    • http://pwr-tech.ru/userfiles/file/68103539496.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/16096ebface1b0---29269666786.pdfIn PDF document text
    • https://etimes.mn/uploads/files/66706118377.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/54611868016.pdfIn PDF document text
    • https://greenvalleykerala.com/ckfinder/userfiles/files/firagonozefisibipezu.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a755e25f4c---91804970044.pdfIn PDF document text
    • http://stromzeleny.cz/file/vupadoriduwugegamikagiko.pdfIn PDF document text
    • http://westtech1963.com/clients/d/d4/d4250bc21dcbbf02d7f9bc68df143add/File/vuvepopalaxiza.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb07032c9e---gelilowimevetodurum.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC87 10472 bytes
SHA-256: 389cf9531737bbe8ee661d7c349183443d1f9bc158409b7acc82afee069d5d26
font_01_sfnt_off00011467.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11467 5120 bytes
SHA-256: af74ca50fb5461a7e7b3a0a8979ce72e4bd49b604cbb4eb7aa54cf2c5c6275f3
font_02_sfnt_off0001267b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1267B 18320 bytes
SHA-256: 70b9c4a53ec210228140d9a4e3188be1fc4913c1842df149b7aae8c125b23659
font_03_sfnt_off00015747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15747 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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