Malicious PDF — malware analysis report

Static analysis result for SHA-256 daaec2b6e01e7e1c…

MALICIOUS

PDF

81.6 KB Created: 2021-08-24 01:45:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 050f50c2dcade5f88baa5a9e01c021c1 SHA-1: 1d7d7ff3b96b4a6be2eca5a9d0ef2acfc6a779e5 SHA-256: daaec2b6e01e7e1c9d4971a762071b41c365f53816c711d510d743f1013e87d4
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://theonejsc.com/userfiles/file/62915479061.pdf In PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/2d4ceb4945c80b3178bbe24e6f60b68f/11061067175.pdfIn PDF document text
    • http://sdds.be/userfiles/file/visoneroja.pdfIn PDF document text
    • https://legyenegyjonapod.hu/userfiles/files/72438184067.pdfIn PDF document text
    • https://renault-service.com/userfiles/kexunaterezasimoked.pdfIn PDF document text
    • https://tw-itemaos.com/ckfinder/userfiles/files/91361569289.pdfIn PDF document text
    • https://sdhouse.info/ckfinder/userfiles/files/99288025975.pdfIn PDF document text
    • http://waelfawzy.com/userfiles/file/35573613293.pdfIn PDF document text
    • https://lifesmart.ro/ckfinder/userfiles/files/bitafefo.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/u3bdsmqg0ijelau01pjm6q59i1/27951228333.pdfIn PDF document text
    • http://shuswapladystriders.ca/userfiles/file/36690912123.pdfIn PDF document text
    • http://hondaototanan.com/upload/files/gefetibikibofix.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/59574184126.pdfIn PDF document text
    • https://akproauto.com/nbloom/fckuploads/file/xozuzasinigukib.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ef26c5141---93370586604.pdfIn PDF document text
    • https://sanipacific.com/attachment/file/45991990972.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d9246e5bd5b---15496889417.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bf2c3f18d13---tifutomawavavewarene.pdfIn PDF document text
    • http://balmybnb.com/t/tutorfirm/uploads/ck/files/jexetajuviwafevonadaj.pdfIn PDF document text
    • http://julianowka.pl/ckfinder/userfiles/files/wisox.pdfIn PDF document text
    • http://cathugo-yachts.de/res/wysiwyg/file/zipinejeli.pdfIn PDF document text
    • http://becucci.it/userfiles/files/96759111351.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=colleges+for+cosmetologyPDF 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_off0000dc60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC60 17192 bytes
SHA-256: 19052ec676089acb701c0c9b2e584b21a0a0bdf6cabf1623e9503eb8322919a6
font_01_sfnt_off00010903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10903 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001211a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1211A 10468 bytes
SHA-256: 456d3989e4218279c7f23e60485bb560221591ab372f2e4c7117bc2ed214d892