Malicious PDF — malware analysis report

Static analysis result for SHA-256 f34b04b10c40f922…

MALICIOUS

PDF

82.9 KB Created: 2021-09-07 17:03:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f0591d6d999516a736353e63ed8ca1cb SHA-1: ef08d1a649879de82f0f9c65e16505ea326e8566 SHA-256: f34b04b10c40f9221957d74319ead21f1f29decf0e0e9586b32cfbf5c9ef6844
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to external domains, many of which are hosted on compromised CMS uploads or appear to be disposable. The document body is heavily obfuscated and unreadable, suggesting it's designed to obscure its malicious intent. The primary function appears to be redirecting users to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://mrsinternationalbeautypageant.com/clients/8/8c/8c0f0497d7166b07b5568c04be8084ca/File/dufure.pdf In PDF document text
    • https://homecareangels.ca/files/files/files/girure.pdfIn PDF document text
    • https://anctools.com/ckfinder/userfiles/files/85207762113.pdfIn PDF document text
    • http://charivne.info/images/file/jiditotidezive.pdfIn PDF document text
    • https://colakcivi.com/userfiles/file/rusekifup.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/xiwaxuzidoletinadi.pdfIn PDF document text
    • https://fiordipannacremeria.it/file/12268730633.pdfIn PDF document text
    • https://keyseries.us/userfiles/file/najerefofozejopiz.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/b049eb7a662a02a8944c9bb1310ab1a7/gifimoridagaxovugub.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dd67a08bae9---5546617406.pdfIn PDF document text
    • http://relaxzenter.com/uploads/files/mabozagowavopegire.pdfIn PDF document text
    • http://akgikorea.com/file_upload/fck_upfile/file/59720891314.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160803736d6004---38878678514.pdfIn PDF document text
    • https://proektasis.gr/admin/spaw2/uploads/files/dupajatezoziz.pdfIn PDF document text
    • https://bakwanudang.com/contents//files/92372424655.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/aat64r1tbgve3v9oftbi8119i3/zagilakokurifiwigogiwasa.pdfIn PDF document text
    • http://drapa-technika.cz/UserFiles/File/ludewitefirulox.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/36899149449.pdfIn PDF document text
    • https://turismopontevedra.com/ckfinder/userfiles/files/kitemidofidesewawekej.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/vokipobiwono.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc922af91f---99521361279.pdfIn PDF document text
    • http://katyababash.com/images/uploads/file/gudugidopuxo.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/sixom.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/0q0gejfsbapgka4u11ks8d2g7p/luvaxefopoliv.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/cccb88006730bd425249860b1e96a390/nafitabu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=cechy+podzielno%C5%9Bci+liczb+zadania+klasa+5+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_off0000dcfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCFC 17612 bytes
SHA-256: a014c7c5d780e7d49dabc6b720fe06f79644446f303d9dff89a3e467e1c2509d
font_01_sfnt_off00010911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10911 11276 bytes
SHA-256: 4df64f45ecd6c236d5a684bc930e2409282d3be69c4e1b7b0a602a6f67b4937d
font_02_sfnt_off000122ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.