Malicious PDF — malware analysis report

Static analysis result for SHA-256 380556d1ac5b759a…

MALICIOUS

PDF

79.0 KB Created: 2021-09-16 07:46:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 18ca3dc4608e0be36e8dbe6991354fad SHA-1: 01f57f514ad89e5953ffed96b11a5d4653b5408f SHA-256: 380556d1ac5b759a4b4a45b1781e7748586c241a9a7c2346488af7f3c6f709ed
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, and the presence of external URIs further supports this. No scripts were extracted, but the overall structure points to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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 https://catamma.ru/uplcv?utm_term=vidmate+fast+version PDF link annotation
    • https://vietnam-pump.com/userfiles/file/bapivasida.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/03d3af1b8a4a0d27dc54245a9059c7ed/wusadufujutojotofikez.pdfIn PDF document text
    • http://osayit.com/images/file/24127968837.pdfIn PDF document text
    • http://hairtransplantmangalore.com/uploaded_files/userfiles/files/85752327298.pdfIn PDF document text
    • http://becucci.it/userfiles/files/pidojipulososugitemu.pdfIn PDF document text
    • https://robert-zauer.cz/userfiles/file/jesawujebomejotituj.pdfIn PDF document text
    • http://topp.pl/_topp/file/66093018222.pdfIn PDF document text
    • http://krr-nfe.com/suratnfe/UserFiles/File/kajezumemavokakebix.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16130c859c798f---26933147043.pdfIn PDF document text
    • https://wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/jiporeletudokidaxoj.pdfIn PDF document text
    • http://sharon-barron.com/userfiles/files/90188063440.pdfIn PDF document text
    • http://julianina.de/upload/file/buvazefuratepegapapute.pdfIn PDF document text
    • http://tochalco.com/uploads/files/52263887684.pdfIn PDF document text
    • https://satesayap.com/contents/files/kekabipuwikewovotivodaw.pdfIn PDF document text
    • https://onecre.com/images/content/files/figagen.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/9914207616.pdfIn PDF document text
    • http://gt-outillages.fr/ressource/site-image/files/wugasevom.pdfIn PDF document text
    • http://stroyindustry.com/userfiles/file/negepilanagawupivemademo.pdfIn PDF document text
    • http://sitarofindiamd.com/userfiles/file/91079301849.pdfIn PDF document text
    • http://xn--80aer5aza.xn--19-kmcm3c.xn--p1ai/ckfinder/userfiles/files/tojol.pdfIn PDF document text
    • http://velocimapper.com/webfiles/file/98137673126.pdfIn PDF document text
    • http://uklearningnetwork.com/userfiles/file/71483246843.pdfIn PDF document text
    • http://chanakyaaerospacedefence.com/userfiles/file/fisobejidapogoxutevukapes.pdfIn PDF document text
    • 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_off0000ce57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE57 18532 bytes
SHA-256: 4258a674717d87c09162c885c005814db33525c84262444cc925010f039388ec
font_01_sfnt_off0000fe35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001164c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1164C 10504 bytes
SHA-256: fba9ac582495d67bb3eea1f332d20b7026ab141abe427d54a91f95a412253288