Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddd0a24ceaf4dd64…

MALICIOUS

PDF

82.6 KB Created: 2021-09-21 00:37:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 26fde9875c3299d220e854b7fcac855d SHA-1: cd8a0f9929441b1341f9b440177f1c24f1f53eec SHA-256: ddd0a24ceaf4dd64149249e45d08f8777ec8db70a6a7157fc003a8108b53689b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a significant number of external links, many of which point to disposable hosting or compromised WordPress sites, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. The embedded JavaScript is a common technique for executing malicious code within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://travellifeafrica.com/ci/userfiles/files/87551324466.pdf In PDF document text
    • http://domingo.hu/ckfinder/userfiles/files/34144149892.pdfIn PDF document text
    • http://thuephotocopytaihanoi.com/upload/files/bunosigakugud.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/25473375136.pdfIn PDF document text
    • http://miydz.com/mingyi/images/userfiles/file/dajepelugo.pdfIn PDF document text
    • https://ozora.schaffsen.com/contents/file/34297807897.pdfIn PDF document text
    • http://autostyle-japan.com/js/upload/files/98032280904.pdfIn PDF document text
    • http://joyear.com/ckfinder/userfiles/files/84239132806.pdfIn PDF document text
    • http://seosanhrd.com/userfiles/file/gupokofuwatabedip.pdfIn PDF document text
    • http://debsecond.net/UserFiles/File/degod.pdfIn PDF document text
    • http://saraya-shop.ru/upload/files/bafigej.pdfIn PDF document text
    • http://aolisenjiancai.com/data/files/11189423518.pdfIn PDF document text
    • https://www.pirkitpadangas.lt/ckfinder/userfiles/files/bukowixuwegebutitosives.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/jiruw.pdfIn PDF document text
    • https://hoya.mobioptika.hr/UserFiles/file/55381356734.pdfIn PDF document text
    • http://hoaiduc.edu.vn/ckfinder/userfiles/files/77065226486.pdfIn PDF document text
    • http://aotwresort.org/ckfinder/userfiles/files/43953143049.pdfIn PDF document text
    • http://myagreement.com/UserFiles/file/gupidaginobasosu.pdfIn PDF document text
    • https://vatlieutaphu.com/upload/files/84828646571.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/0hanf0f5o3bn3c47mqnlesoa6r/21199560671.pdfIn PDF document text
    • http://www.hangmandigital.com/files/file/35779143483.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16132785edf8e8---wisivemuxesurekota.pdfIn PDF document text
    • http://zs-oilfieldequip.ru/d/files/56496057633.pdfIn PDF document text
    • https://cytokin.ca/upload/editor/file/dikipokugajunoximu.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614254c465364---37736838913.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139e905abb3a---1487535897.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=betting+tips+apk+downloadPDF 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
    • 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_off0000dc4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC4D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f464.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF464 10700 bytes
SHA-256: 006ec4cda9b8088e81469387e5e7e75d03547a55c289c5001f4c81f999bc8e83
font_02_sfnt_off00010cf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF6 18468 bytes
SHA-256: 9737bbabff2d884184d080b690cf9455b52742af84a35c0992a25df1e1dd8018

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