Malicious PDF — malware analysis report

Static analysis result for SHA-256 7865493304e8f145…

MALICIOUS

PDF

86.1 KB Created: 2021-09-15 18:48:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4f195265fb72d36e657245359fe69550 SHA-1: 326f5373c503ae8390b31330e44845b0acc5a361 SHA-256: 7865493304e8f145e050e3984cc86d524ec5a1d7b7008c86a5432fe8ec93c545
156 Risk Score

Malware Insights

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

This PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The heuristics indicate it functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS uploads. The presence of numerous unknown URLs suggests an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://ivelinabozilova.com/userfiles/file/74859451664.pdf In PDF document text
    • https://intrastorg.com/userfiles/file/68561505216.pdfIn PDF document text
    • http://jualumnitoronto.com/editor/uploadfiles/45928534820.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/3e34f805199cb498e6e760cd4fbe9f1a/846430684.pdfIn PDF document text
    • http://cee1968.com/ckfinder/userfiles/files/40955161762.pdfIn PDF document text
    • https://raovat72.vn/uploads/news_file/64045761248.pdfIn PDF document text
    • https://nhanloc.net/userfiles/file/63470614573.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fb9050e653---44752139037.pdfIn PDF document text
    • http://domario.ru/userfiles/file/42531787704.pdfIn PDF document text
    • https://tylbm.com/Upload/ckeditor/files/51579150880.pdfIn PDF document text
    • http://djpress.pl/Image/files/tuxetikelujikomoluxe.pdfIn PDF document text
    • http://www.saaegfpolis.org.br/ckfinder/userfiles/files/4195823917.pdfIn PDF document text
    • http://osayit.com/images/file/97242747673.pdfIn PDF document text
    • http://szmchem.com/userfiles/file/1661034884.pdfIn PDF document text
    • http://immobilier-valence-agen.com/userfiles/file/popibojevewo.pdfIn PDF document text
    • http://xn--72c7caerxx0d3a9eve.com/UserFiles/File/tikujidami.pdfIn PDF document text
    • http://workontext.ru/media/file/terarugusus.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/41570080137.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/51226668744.pdfIn PDF document text
    • http://sro52.ru/uploads/files/69180720075.pdfIn PDF document text
    • http://notar-frings.de/userfiles/file/26722635015.pdfIn PDF document text
    • http://sooclose.eu/upload/File/vifibekoxarejaluw.pdfIn PDF document text
    • http://worldofpacifiers.com/editor_uploads/system/files/sezata.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/161335f0da786b---33614197541.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/xoribi.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/xubowuva.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/28779748729.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=how+to+trade+in+adopt+me+2021PDF 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_off0000e8c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C4 10708 bytes
SHA-256: 0764db522fff3cc1a766fe371d421fa5ddd9128ca06ceefa445707666ed02535
font_01_sfnt_off0001015d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1015D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001196f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1196F 18840 bytes
SHA-256: e738c728916986145008f3908173f95a7f547d3827ac87946bad3179a0424106

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