Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e018ac33e7b7c7c…

MALICIOUS

PDF

89.2 KB Created: 2021-09-09 10:53:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: fb81143536e83d4822bbda8f446c14a0 SHA-1: ad2463e532a72dd611fe388d6603743cb17a2052 SHA-256: 5e018ac33e7b7c7c0bf3ae3d29fa4e667f245397ddfd1e0655b2f0264527b1b9
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16138b9ef7a0e9---xuwuwama.pdf In PDF document text
    • https://rosedreamholidayhomes.com/ckfinder/userfiles/files/kasox.pdfIn PDF document text
    • http://wingmanresearch.com/userfiles/files/6368805903.pdfIn PDF document text
    • http://sskj.pl/userfiles/file/64786132723.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/vizujikidotikegamenudugi.pdfIn PDF document text
    • https://ourlady-schools2.com/userfiles/files/50737416894.pdfIn PDF document text
    • http://lamorenj.com/userfiles/files/82575203680.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/dijawumulowuzodifi.pdfIn PDF document text
    • http://lightofislamonair.org/uploads/files/94614573798.pdfIn PDF document text
    • https://mb-classic-service.de/userfiles/file/5817385777.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/161334ba03baf5---23832821527.pdfIn PDF document text
    • https://planet-pvc.com/upload/files/67455500214.pdfIn PDF document text
    • http://inimtrento.it/userfiles/files/69982071254.pdfIn PDF document text
    • http://www.rannatennis.ee/data/upfiles/files/jefibifefuwixesavoj.pdfIn PDF document text
    • http://2sisaccount.com/userfiles/files/84848300020.pdfIn PDF document text
    • https://booburger.myagenda.cz/pictures/editor/files/50110871918.pdfIn PDF document text
    • http://studiofagiani.eu/userfiles/files/49948980619.pdfIn PDF document text
    • https://ethnicminorities.heephong.org/ethnicminorities/cmsadmin/ckfinder/files/mekidebenizemefot.pdfIn PDF document text
    • https://bawwabatrizq.com/userfiles/file/davozesimalimodinolafa.pdfIn PDF document text
    • http://www.egavilanes.com/ckfinder/userfiles/files/zunidujulitakus.pdfIn PDF document text
    • http://ivelinabozilova.com/userfiles/file/nedikaf.pdfIn PDF document text
    • http://nirmalapublicschoolerumely.com/userfiles/file/42457347938.pdfIn PDF document text
    • http://workontext.ru/media/file/76723159191.pdfIn PDF document text
    • https://virtrade.gr/userfiles_lybo/file/texazuzomomebore.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=unturned+forest+military+helmet+idPDF 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_off0000f61d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF61D 10840 bytes
SHA-256: 8cb45b21f7104f9851c06271f1333ee081f4dcc1a2dd20d98ce6a0eb93032662
font_01_sfnt_off00010ef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001270a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1270A 17920 bytes
SHA-256: 32765b49661b1db546cb6be1dc24102ad65ed01dcca4a6978fc1781924789315

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