Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9e86eb92fc15a19…

MALICIOUS

PDF

75.4 KB Created: 2021-08-28 06:45:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4af15c4423e03f4287fcae37a8c09739 SHA-1: 926cfe8adbdf2e368816ac58ba108380073ca9e2 SHA-256: d9e86eb92fc15a19973691f0d4bae6ce34249cd32f5a1f8b3b00729cab2ad1cd
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS uploads and disposable hosting, likely intended to redirect users to malicious sites. The primary attack pattern involves luring users through these links, potentially for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://bethanybaptistcolumbus.org/clients/75549/File/darukidoxanomikago.pdf In PDF document text
    • http://anthonyvienna.com/sites/default/files/file/73313059287.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/48828349468.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/a7bd0b3ba00c5852c5e4baaae1e3028b/jazikoni.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/gobepototugunifalesegisum.pdfIn PDF document text
    • https://aonetreks.com/uploads/file/71163496513.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/0bb2bc6be4d91813837599e9fd341880/56838532365.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/21839773249.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160f51b26f0301---82261638300.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/c5ddi84lih3udluk7q7tmn8tdp/jisesoruwofikeserupudugiz.pdfIn PDF document text
    • http://myphamlulanjina.com/upload/files/tanefowovati.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608f7d1635551---xubotafibanitexud.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/pevijatu.pdfIn PDF document text
    • https://heuresromantiques.com/upload/files/32812361199.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a449b8bfd2d---6606993086.pdfIn PDF document text
    • http://www.motionmantra.com/userfiles/files/7491090985.pdfIn PDF document text
    • https://kaktutzhit.by/uploads/files/64871049152.pdfIn PDF document text
    • http://ilovegabal.net/fckeditor/_upload/file/32590556502.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/a9b5c81a0441605c450faae294b21263/8646373605.pdfIn PDF document text
    • https://mccartha-cobb.com/userfiles/files/51612236528.pdfIn PDF document text
    • https://actor-conseil.com/files/file/91535081975.pdfIn PDF document text
    • https://ises.ca/phpsites/vertical_living/uploads/file/kalixulupozipomakif.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160f76e0b29275---65470154489.pdfIn PDF document text
    • http://perfectionistpaintingnj.com/ckfinder/userfiles/files/rasiko.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=the+raven+cycle+first+bookPDF 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_off0000c575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC575 16204 bytes
SHA-256: c1c98c731e0bc3c8b8cd647c1869952bd5ee973c3dde58cf5247af6536509f91
font_01_sfnt_off0000ee89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE89 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000106a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A0 10808 bytes
SHA-256: 2fa3cd70f032aeaf7dd2f64338a11cb88e35da761a240ed3146a8321d4d6c672