Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d3dcf0639f3ad44…

MALICIOUS

PDF

82.6 KB Created: 2021-09-18 16:48:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-14
MD5: a49e061e58f7ac1c78a67890de74b7be SHA-1: cd1ecdff6cdca9d84f871501a9b6afbf2f3abb79 SHA-256: 0d3dcf0639f3ad44ebf39efbfbf170e617e05f8ab2bcfbd38768fa036ade2a75
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to PDF files hosted on domains flagged as potentially compromised or disposable. The presence of embedded JavaScript and a high ML classifier score further indicate malicious intent. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a phishing or trojan distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://hieuchuan.com/upload/files/sigiwe.pdf In PDF document text
    • http://flapboxes.custompackageboxes.com/userfiles/files/govax.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/tibojilugubedigogotemu.pdfIn PDF document text
    • http://xmzhj.com/UserFiles/file/3983075532.pdfIn PDF document text
    • http://chinamakina.com/userfiles/file/34482683464.pdfIn PDF document text
    • http://longbeach.ilovepokebar.com/uploads/files/60370049502.pdfIn PDF document text
    • http://grandrosso.com/js/upload/files/fivegarodudogujezefoku.pdfIn PDF document text
    • https://elnativocoffee.com/silver/upload/files/25879751265.pdfIn PDF document text
    • http://sayarbobinaj.com/file/22086367479.pdfIn PDF document text
    • http://cyuanmei.com/userfiles/file/repelebekiwijoji.pdfIn PDF document text
    • https://foulardfotografando.it/file/kikozimarizamep.pdfIn PDF document text
    • http://sspvjd.com/FileData/ckfinder/files/20210912_6C39967583CF2C01.pdfIn PDF document text
    • http://salukool.ee/upload/userfiles/file/87883117964.pdfIn PDF document text
    • https://mgs-on-track.com/app/webroot/userfiles/file/86126256572.pdfIn PDF document text
    • https://realxenon.ru/uploads/files/mudugubimetuxekiwo.pdfIn PDF document text
    • http://snabsz.ru/ckfinder/userfiles/files/guvadotabefotatizotaso.pdfIn PDF document text
    • http://gocoachfox.com/userfiles/file/29862871174.pdfIn PDF document text
    • http://2990592.ru/ckfinder/userfiles/files/41700561385.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/780234b07db8ed235b0cbfa83064fcf2/58831067820.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/2de2371ecb56191102d350e98081cd84/2046623602.pdfIn PDF document text
    • http://cwesp.biz/upload/file/97079081666.pdfIn PDF document text
    • https://eminentland.com/admin/userfiles/files/13215391823.pdfIn PDF document text
    • http://yugang360.com/upload_fck/file/2021-9-18/20210918151028425320.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614225bc5d827---soxemiso.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/161413d188bd77---63435753190.pdfIn PDF document text
    • https://widerbet.pl/userfiles/file/nasofeniribov.pdfIn PDF document text
    • http://shendaoguoji.com/data/attachment/file/lufozozuwekosiwopo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=apk+free+linkPDF 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_off0000e1e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E9 17660 bytes
SHA-256: 392b246d2506b88146273615dc216f505fe2b24327be98610c1da38584cc453f
font_01_sfnt_off00010f55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F55 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001276b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1276B 9876 bytes
SHA-256: 0985f43c868114c60bbc33d7e08f37330fdb44038368c25f8c959d964e7fcf31

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