Malicious PDF — malware analysis report

Static analysis result for SHA-256 78f568e004277dc1…

MALICIOUS

PDF

133.2 KB Created: 2021-07-30 09:14:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: bd71bc7952c61eb31f92b53809709135 SHA-1: d5c3cba06c772541067684a32f03d60309d99186 SHA-256: 78f568e004277dc1ab483fbca483482efd77558d6cdf6352fa3edcb7d950643a
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to potentially compromised or disposable hosting sites. The presence of these links suggests an attempt to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7448

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://prosquash.by/data/xaperisosiwurupawe.pdf In PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/befba43826bb2b64a0f402c5e8a3051c/58414332217.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/a7f63ae2c0a203c6fd2b27cee1c2b933/22132641132.pdfIn PDF document text
    • http://short-story.ru/upload/file/42330602106.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a33828d9efb---zevasojizavatoniwugusabod.pdfIn PDF document text
    • https://indirimlipin.com/calisma2/files/uploads/pilipixabawejanujaxi.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3dad6e28f9---45480410704.pdfIn PDF document text
    • https://kuepancong.com/contents//files/sovakigop.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/tc4vua40qj1tanc9e6h5lbc9q9/ratago.pdfIn PDF document text
    • http://abwingsbuffalo.com/uploads/files/nupekoj.pdfIn PDF document text
    • http://school19-zav.ru/userfiles/file/16207794771.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/files/guguxudobediko.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/20045406287.pdfIn PDF document text
    • http://simonhoirup.dk/userfiles/file/7185351046.pdfIn PDF document text
    • https://tylbm.com/Upload/ckeditor/files/xosamuramenowolonobajatus.pdfIn PDF document text
    • http://noospc.ru/SITE/files/editor/file/81933535784.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16080917c96fb3---2439742856.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles//file/pepivuledikujobedimonufok.pdfIn PDF document text
    • https://raiporjai.com/piceditor/file/pokesovatama.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cba0b9df85a---galupesikob.pdfIn PDF document text
    • http://stainless-faucet.com/uploads/htmlupload/files/lajun.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/71351727379.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/5647ab4a2599199ea4182c623d1953ca/16043360854.pdfIn PDF document text
    • http://mmcaana.com/clients/29274/File/67486607563.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16070766a742a8---88483062761.pdfIn PDF document text
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/db0cfd29b272e1c240eb3e54e712178e/penabokinebufipoxa.pdfIn PDF document text
    • http://sampsonancestry.com/clients/d/d9/d9bd9208c4e45de01aa31840e3a8c66b/File/73619097471.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=is+agglutination+good+or+badPDF link annotation
    • 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_off0001aec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AEC3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001c6da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C6DA 10480 bytes
SHA-256: b9990155c330371ee5c1f0088989e69014563ef01ac1ae68fb2c4dcad6c0e501
font_02_sfnt_off0001de7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DE7F 19004 bytes
SHA-256: 7d3d1f4cbd35449872ed0c84fa4d2f2b2b9d62ecb00f3a80452808b6af789692

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