Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c09299f01a7d533…

MALICIOUS

PDF

87.7 KB Created: 2021-06-20 20:08:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: c0c6fffb898b40e528364cefd920b996 SHA-1: 569f3ce619536988d5e5daab9279f3df5c5991b8 SHA-256: 6c09299f01a7d5337657b8d91311b094dc4172bc32a2a0aebbcb282b6e32123f
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 http://vamaconsulting.sk/userfiles/file/3344963852.pdf In PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/palekuwukazatitovezisetek.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/50941232439.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/16074549fa7d5b---basapej.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/edbcf15995378d2a2e9d75e8cce7a243/tudobozat.pdfIn PDF document text
    • https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/k3aijnh30775o6l55mfh7k5agj/94572129487.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086c78796215---gagalenarunubuvuk.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/41d0e9d39227b540eecab18f087c905e/24533262306.pdfIn PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/liwodonorijawev.pdfIn PDF document text
    • http://www.electricman.in/demo/frontend/web/uploads/files/tunixusuxufemizodexoju.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c94a2d430d9---24131357207.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160790f4d288b3---88994418940.pdfIn PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/zisonibijolola.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079a356422f0---17916465935.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b25264108c---rirarel.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=zayn+malik+let+me+mp3+download+pagalworldPDF link annotation
    • 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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn 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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c42a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC42A 6744 bytes
SHA-256: 048fb1891f432488516cd811e7b04d68e7d39e548ca3495625137f8fb0c23ff4
font_01_sfnt_off0000d4de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4DE 4616 bytes
SHA-256: f6cc0cb65cddca4471b3356b2f031491eba1b776f6a9e1616c369ed91e83cb06
font_02_sfnt_off0000e4df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DF 5480 bytes
SHA-256: a07fced4818750564a26c19f56ddb76e5c3b7c755412c4df798fecbb4cd9396a
font_03_sfnt_off0000f789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF789 3760 bytes
SHA-256: b7c766a6938d995d85f099998d11f88921a13df265bcb47a0155eb54e3bcc621
font_04_sfnt_off00010685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10685 12068 bytes
SHA-256: c30ab9727b4fb8228e70bc19df007a007e36dacadb2313651845a1fde9e52bf8
font_05_sfnt_off00013005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13005 18956 bytes
SHA-256: fa47a69a34e16624b854cfc9e4697223897d1209dff71e55b540b329c794697c

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