Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e502de00c3b82be…

MALICIOUS

PDF

108.2 KB Created: 2021-08-15 10:25:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 6d65786cb23cca89d1433ae01f078984 SHA-1: 7f4f431dc805adc925ff281c40835bcba0f563b3 SHA-256: 1e502de00c3b82be1dd67af2a8707af3ce61388ce7183f2013a99049ee01e83a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to potentially compromised or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to host malicious content or redirect to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fructusartis.com/i/File/77534047189.pdf In PDF document text
    • http://glotecgh.com/upload/editor/file/mekusefoxevusimijoduw.pdfIn PDF document text
    • https://schlosshotel-murten.ch/userfiles/files/ziwekifakugo.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/wuzixi.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608512c14cf3f---48867832938.pdfIn PDF document text
    • http://michardardillier.com/ckfinder/userfiles/files/75311028402.pdfIn PDF document text
    • http://olympicburger1988.com/uploads/files/rugiguzesegitaga.pdfIn PDF document text
    • http://talk200.com/admin/admin/uploadfiles/file/65464448454.pdfIn PDF document text
    • http://alexanderjamesbackcatalogue.com/userfiles/file/monisowevugixejoje.pdfIn PDF document text
    • https://rivnerun.club/images/files/wasobajirugejebonewinavux.pdfIn PDF document text
    • http://ed-web.cz/userfilesfile/vatuje.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/6e4ed7ee41b1d1205f0d0695c584c847/zabarepojereji.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/rizatuwedumelajuboluritap.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d54dcd8eaf---28560093371.pdfIn PDF document text
    • https://bczenekar.hu/files/file/51872026419.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/4u9nngue9mm1hbspkmki3tal75/putin.pdfIn PDF document text
    • http://vattucongtrinh.com/userfiles/file/zitupojasokimonebekavepiv.pdfIn PDF document text
    • http://travellightnepal.com/userfiles/file/39815708451.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/d96831cb3e537c8d9b2f14cc46717b82/63155376551.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1609da25a7cb6d---68356753036.pdfIn PDF document text
    • https://sensesgrouphk.com/louis/STARKGROUP/ckfinder/userfiles/files/87837838611.pdfIn PDF document text
    • https://propiedades.net/ckfinder/userfiles/files/nigizuvipafug.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c855a9c7c0---64796590634.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=what+is+a+ct-guided+needle+biopsy+used+to+detectPDF 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_off00014336.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14336 11076 bytes
SHA-256: e66598d9cf79a5ab31c4b9819c91bb5a211aafce5801c86855a4da401eb3210a
font_01_sfnt_off00015c97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C97 17056 bytes
SHA-256: 39b7670e0954259600ed949f21b7322d9fef3ce745e17a3df628696bfcdd186e
font_02_sfnt_off0001895f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1895F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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