Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e9a69d950e97170…

MALICIOUS

PDF

92.8 KB Created: 2021-09-05 14:22:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 01a77c71117564ba50c5cc38a1e3c43b SHA-1: 9bc1135f7916439ed10317d1d26faeba4a332158 SHA-256: 9e9a69d950e97170382f92491d742ed8d050079463275e7a9cb402fed61d3644
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The ML_NYX_PDF_MALICIOUS heuristic and ClamAV detection strongly support the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://hiredriver.com/uploads/assets/files/60853204985.pdf In PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/2062521368.pdfIn PDF document text
    • http://alacarte-design.de/userfiles/file/wuzomuguwogekukabanemuko.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/d35bd079f36516eee0c1caed72d51b1a/36100640742.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b8f94e6281---jokutubilivadizimezul.pdfIn PDF document text
    • https://atraba-holding.com/userfiles/file/2612455223.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607b77fb2d541---megenedevutumatosa.pdfIn PDF document text
    • http://wish-pharma.com/upload/files/51101950227.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d131835fc0---zufepupepekufo.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbceea0c85---ronakagokonijedabuxow.pdfIn PDF document text
    • http://hai-bi.com/uploads/files/202108221024313465.pdfIn PDF document text
    • http://colescastle.com/clients/875019/File/mofofa.pdfIn PDF document text
    • http://jingyilin.org/uploads/file/minali.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/bb5330b4f50e336e3f747257ec0728f2/25800324802.pdfIn PDF document text
    • https://gertiesbloomers.com/kousumi/nulook/upload/fckimages/file/dolesizidowagoxigudobidan.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/2a2fed5b9d8151dcb4708e46ac3e7e6e/65597411760.pdfIn PDF document text
    • http://honda-vo.com/upload/file/jijorebotixotibe.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bdfd33f0a3---zawajekapiwevosez.pdfIn PDF document text
    • http://barrybusiness-crm.com/ressource/devis-photo/files/wenomejebuvikavufineman.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f21ce158c5a---79785252909.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/160b62d0cb63f1---58156087444.pdfIn PDF document text
    • http://smeeing.com/userfiles/files/wifejevuguzogutis.pdfIn PDF document text
    • http://piecco.eu/upload/files/pupexodatikajuj.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc7ef26b4e6---74705028673.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd7af3713e4---wabuzijokerido.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=chrysler+voyager+2003+manualPDF 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_off00010232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10232 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011a44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A44 18536 bytes
SHA-256: 83c6ec75bd1d7794752d600ea33ce571c3fbaed8b80994fca31b2dafe5b723e0
font_02_sfnt_off00014a36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A36 11088 bytes
SHA-256: e48d6e1184edc59791d586f1bc5065a515027c4bd285964bd80761ee7427d7e3

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