Malicious PDF — malware analysis report

Static analysis result for SHA-256 89dd2e1bc8b0e23e…

MALICIOUS

PDF

89.4 KB Created: 2021-08-08 20:06:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9249bcdc3af973b1a10a6f2ef53e2e3d SHA-1: d7b6d9ea2891ab4b3d869311e13446a434186d82 SHA-256: 89dd2e1bc8b0e23e97fb61538f95177c19b6e53b746482f7dad7f9b6c6317f46
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate an attempt to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9886

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://indel.sk/userfiles/file/lokinikamodidojobobi.pdf In PDF document text
    • http://tuclubcr.com/campannas/file/nuviduf.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2f60244c4---fekovawalobigisakudazofob.pdfIn PDF document text
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c6b61e3a0f9---bepoxubokalakixonopode.pdfIn PDF document text
    • http://dbcasagayathottam.org/assets/uploads/cms_images/files/tigeledukakanizikolodi.pdfIn PDF document text
    • https://ksuskalology.com/images/file/faladozibowugedujene.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094befadb735---58678136125.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608991868dd5e---dumofimijeki.pdfIn PDF document text
    • https://satuldelut.ro/ckfinder/userfiles/files/15508092166.pdfIn PDF document text
    • http://bi-acaovo.com/upload/files/53720421120.pdfIn PDF document text
    • https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4f653e059---tefotipepimavupugobos.pdfIn PDF document text
    • https://summit-christian-academy.org/scauserfiles/files/49127664303.pdfIn PDF document text
    • http://americanpetrochemicals.com/customers/CMS-IMAGES/file/57151067343.pdfIn PDF document text
    • http://cnmrobotics.com/files/files/zegilokulogujexabolafilim.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/7fbc6662e827298033cef55511ce1696/fipimibutosalolulojudi.pdfIn PDF document text
    • http://tvsatkrosno.pl/userfiles/file/62400924267.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607784d31f73c---93822942017.pdfIn PDF document text
    • https://99shayari.in/userfiles/files/vijuxexurukekofaxe.pdfIn PDF document text
    • http://osc-pribor.ru/products_pictures/file/70011535234.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a8256a8a964---tizomiladunalimanareku.pdfIn PDF document text
    • https://dovolena-jiznicechy.cz/uploads/kafasoxidanavejadexa.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f7cca662f---67136334293.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/27490752964.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/luxiwabafujesefejovapax.pdfIn PDF document text
    • http://itemclinicchina.com/ckupload/files/42319195364.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160745f18e8d65---mupavenodinum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+remove+a+porter+cable+drill+chuckPDF 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_off0000f508.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF508 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010d1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1F 10984 bytes
SHA-256: 7c776fbd3f058f99ae3b214cbd1da2a2ea8bb9fc06971f8745d40911563e7043
font_02_sfnt_off0001265e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1265E 18136 bytes
SHA-256: 2805de1b4c0e088fab9203a8a28504ab7cca9e86670cbce195ffc08917ec2e22