Malicious PDF — malware analysis report

Static analysis result for SHA-256 07832883bd14d951…

MALICIOUS

PDF

79.9 KB Created: 2021-09-07 09:09:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 64bf3ff1eebf1d2fe79f3d0db0b39ffc SHA-1: 05b28fd9f957508c11db2e4720e251f3c3c6ee49 SHA-256: 07832883bd14d95192627593e01d4787078b4976bfa5d9e54bdebc33d73a6793
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to potentially compromised or disposable hosting. Heuristics indicate it functions as a link farm, with a high ML score and ClamAV detection confirming malicious intent. The primary goal appears to be redirecting users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://edwardfmcgintypa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/63369334663.pdf In PDF document text
    • http://parentini.it/userfiles/files/88359205738.pdfIn PDF document text
    • http://shengyaweb.com/uploadfile/file/2021081523535733.pdfIn PDF document text
    • http://union-montage.pl/userfiles/file/83623661971.pdfIn PDF document text
    • http://chatyzvule.cz/uploads/losededed.pdfIn PDF document text
    • http://fazekaskozpont.hu/images/upload/file/jigepunilinuj.pdfIn PDF document text
    • http://mnogonomerov.ru/uploads/file/komajegodakig.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/43139885154.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160815a6dec5e3---78630268745.pdfIn PDF document text
    • http://bendhigh1970.com/clients/1/10/106e6567aa8bd3cecf4080670b11bd10/File/nozevamizejugojevurowil.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160af6c6f0c14c---sabufalapi.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/kafajagam.pdfIn PDF document text
    • http://irk-yoga.ru/upload/files/zilijaruxotexeki.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/e528c1efa68af06247eb886cd75dd13c/99805483673.pdfIn PDF document text
    • http://tmtechvn.com/webroot/img/files/xasisamutuwadojiletatapa.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160caaa762919f---sodevofaramejumako.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e68e89a9a---90250496491.pdfIn PDF document text
    • http://szjwwj.com/userfiles/file///82642408879.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612b21480db8c---gisemiba.pdfIn PDF document text
    • http://fxmeat.com/upload/file/b22b480ef955515e84ea0db4f7f20cfd.pdfIn PDF document text
    • http://gs-metals.com/filespath/files/20210807034852.pdfIn PDF document text
    • http://prvugkh.ru/uploads/files/37403678551.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/17653915232.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=small+engine+repair+manual+for+salePDF 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_off0000d1ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AC 19028 bytes
SHA-256: 1f800bff62d2dc40cb1356231f8040b57473aeb0526482015cb033dad0d23c24
font_01_sfnt_off000101c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C9 10780 bytes
SHA-256: 6df445fb179d1c105924e56b4922fd3c84dd14c961e12c288ea6290a06149540
font_02_sfnt_off00011a84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A84 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1