Malicious PDF — malware analysis report

Static analysis result for SHA-256 06709ef4f00f1a9b…

MALICIOUS

PDF

103.0 KB Created: 2021-06-29 05:35:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 02edcc2bfd8e5c6eec4a972e0808b71b SHA-1: 47ba0d5d99516c369a95585e0b6707c61b7dbb19 SHA-256: 06709ef4f00f1a9b328729148825de005b923719b0c95d0efc8d6f723e8d8a6a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, with numerous URLs pointing to compromised WordPress sites, suggesting a phishing or malware distribution scheme. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond what the heuristics indicate.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

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://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/2ik33t3gnpmghe6fg1jlkp04jj/jedagoladibiko.pdf In PDF document text
    • http://uceng.net/_UploadFile/Images/file/matapeforavomawasuf.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/rqcvvpri4l1cdgq47k1770cslv/14987145036.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/10052972227.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/0942418d175792006b6f249e1ca9fa0b/15358167791.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/89b3d4faabc9e619e04c06e6c58d7801/lesegokojofa.pdfIn PDF document text
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/cbb9796930a938f9ae3f786c29e4f0fc/33168576246.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/7b0cb070794a9b2dcc3c2758e46a3ddc/75894918612.pdfIn PDF document text
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/a26c871cca522546927f0b58154dd1d2/vinitokutorawegawe.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abc85dc435b---wejaxufitune.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/53377760651.pdfIn PDF document text
    • https://unosms.us/userfiles/file/46255215706.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/566504ec1c777386c9fc528f86830067/xopanep.pdfIn PDF document text
    • https://www.bistro-e.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef4240eeea---wadobopewexafivinorij.pdfIn PDF document text
    • http://ligonfamilyreunion.org/clients/9/9a/9a44987365eba454cd9b2deda39aa7c0/File/wegitol.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/8a19e1d9cc4c89cc975ab6d96056aa68/70817448740.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/35io8v7jro172oba4lgq7u4690/mimilebukeferu.pdfIn PDF document text
    • https://www.oneirishrover.com/wp-content/plugins/super-forms/uploads/php/files/255ac911c607ec6e30d06333cae1a808/48247395788.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/92b55bf22cf1da4c294f19ab29730520/45257803161.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/85172559455.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/3e811ecfd9f07e8479c2e4ce6b304366/gosadekifumuremopit.pdfIn PDF document text
    • https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/95a1d8c022ca8c3e5fd628a4ddecb526/resebidokunanoxogilo.pdfIn PDF document text
    • http://plkorea77.com/ckupload/files/baxutuwavo.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/odq7sf0csfdejuf7ves3o0lve5/47770079882.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=jehovah+my+strengthPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11097 19824 bytes
SHA-256: 6e109d623bb4dab3a0922b0c7928f5182df6f9ec123fd6d2e25de2504f264236
font_01_sfnt_off000142c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142C7 17308 bytes
SHA-256: 4e06552a84366e2686b3bb6a46274d690214d64faee14b7768248b882771c3a8
font_02_sfnt_off00015cd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CD1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000174e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174E8 10588 bytes
SHA-256: 63972a21fe7c18af6ccdda0b678f02ee019791af4daa7728f2c5c8a97cd79767

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