Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a993af0d4ebc0ca…

MALICIOUS

PDF

78.5 KB Created: 2021-09-06 05:18:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 59a2068884eaaec99e2e8d0ef9ddd6da SHA-1: a01e86bd63a5085d79ef80da26d3befe781c0b4f SHA-256: 7a993af0d4ebc0cac05edf3336e31e1e0423ffd0e53522a318b48563f8612704
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, pointing to numerous URLs hosted on compromised WordPress sites. These links are likely used to distribute phishing content or further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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 https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/16b1c1d6a0add36c7b952a25d6af69b8/35667238919.pdf In PDF document text
    • http://richiefamilyreunion.com/clients/7/7d/7d03816b951c94fc7c065ced7c7ccdcd/File/vuzopuvamisob.pdfIn PDF document text
    • https://vibingvibes.com/userfiles/files/wilemexad.pdfIn PDF document text
    • https://aplusadvance.com/naver_editor/data/file/38468167434.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/868f0ec1c2e11a80437305a13765d1ab/veveretasejuwapifasufugu.pdfIn PDF document text
    • https://jjpremiers.com/files/44716513579.pdfIn PDF document text
    • http://chanakyaaerospacedefence.com/userfiles/file/sugopabuvafixamifo.pdfIn PDF document text
    • http://xn--80ab1a9a.xn--p1ai/sadm_files/nagusa.pdfIn PDF document text
    • http://gillsandgeckos.com/userfiles/file/jemekigapapinoxipulugoba.pdfIn PDF document text
    • https://aarhuskortet.dk/images/file/9241655083.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/sf78rnsom13nqricipc2a0gqi2/10099281889.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a29605c40b3---deferedajurafexifukudujiw.pdfIn PDF document text
    • http://one9five.com/userfiles/files/32834588591.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/fiwaxomabav.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/2c7cf7015fbc231317512a52454e40fa/30146135419.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8c634448845c2ddab7c07e022550d52c/tozebotadijotige.pdfIn PDF document text
    • https://mldom.xyz/web/img/podborky/files/42061320666.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a95c9005428---55356411161.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d6cc4f82537---67047909648.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160707b3fe6dce---wulub.pdfIn PDF document text
    • https://namdolove.com/FileData/ckfinder/files/20210720_9735DA023FF54F54.pdfIn PDF document text
    • https://fleuriste79.fr/ckfinder/userfiles/files/totafapunojaxonewesobi.pdfIn PDF document text
    • https://eitmedu.in/ckfinder/userfiles/files/sewavaregunokewasi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=ramayana+pdf+in+teluguPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB594 10712 bytes
SHA-256: 8ee96de1d089c4acea6a14b7863a3ed568a6c02458d8feb9252648f131c51640
font_01_sfnt_off0000cdf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDF1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE602 16500 bytes
SHA-256: ac241b3affec4b36bbc8e74f0ea6661b1d1f1c8d1db8d5d7bd55a89d6179dbce
font_03_sfnt_off0000fd15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD15 18252 bytes
SHA-256: b93504e170d1274baee9a640c0b6feb10a8595c0e891ddfdb9d7d11a1bc0a3c1

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