Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e060842e0599553…

MALICIOUS

PDF

90.3 KB Created: 2021-07-25 03:10:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 60553733dd1e5e1eba186fdad18f0593 SHA-1: 46eb98e7904db21e4f421472a1113b927e71e656 SHA-256: 4e060842e0599553cdd1c0a680d79fa2af6c04c7017a3a29f25760b0e56be202
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised CMS uploads or disposable domains. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://interreg-ipa-husrb.com/downloads/42789747132.pdf In PDF document text
    • https://drvishweshwari.in/userfiles/file/18019098242.pdfIn PDF document text
    • http://hengtaixin.com/HangShun/ckfinder/userfiles/files/nisixisosekomukobutimera.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/s5dmmpgpn9hmf21htlt8urhsis/25991263354.pdfIn PDF document text
    • http://www.empresshasnoclothes.com/siteuploads/editorimg/file/47663867797.pdfIn PDF document text
    • http://51www.org/uploadfile/file/adb6e944f185664a88efb7fbaded0128.pdfIn PDF document text
    • https://sayurhijau.com/contents//files/13572960271.pdfIn PDF document text
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/85605449622.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/16096a435ac60a---nudamewiba.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd8bdc339cc---61495698021.pdfIn PDF document text
    • http://fitnessklub-impuls.pl/uploads/assets/file/45740674420.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/1d49f526453a78efd07285dbc95b1b92/miseduxowefogomopegat.pdfIn PDF document text
    • https://budgetparking.ca/admin/uploads/file/labunopagufedivapupigod.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0e24a72fe---kotivi.pdfIn PDF document text
    • http://ozdoby-betonowe21.pl/Upload/file/66178038680.pdfIn PDF document text
    • http://rld-carbon.ru/file/kofobulurubebigaf.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a57af366e0---jotogifumoru.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/3dce55721d4d322d87399b92d5415b19/18422674948.pdfIn PDF document text
    • http://mashtalkandil.com/userfiles/file/50088749823.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b09a87296e5---kajozufoluvidu.pdfIn PDF document text
    • http://doubletroubels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607795d50cd64---wepupojil.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/sanubotukugudukep.pdfIn PDF document text
    • https://datajournonepal.org/files/14563718738.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=sucesiones+num%C3%A9ricas+ejercicios+resueltos+pdfPDF 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_off0000f760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF760 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010f72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F72 18304 bytes
SHA-256: 79d3876dbdec1447d8fa37081f39d13d93595b5b6f540ca65c35d21e8629b616
font_02_sfnt_off00013e4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E4A 11240 bytes
SHA-256: 8676da8f67529318ef21f46706a577ffff3400013d703334e3f31bd4218c6323

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