Malicious PDF — malware analysis report

Static analysis result for SHA-256 68e10bd7bb9a4548…

MALICIOUS

PDF

76.3 KB Created: 2021-09-28 02:11:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: adcf2b34d6de22646110386336daf361 SHA-1: d68bb986e3418aea678d0337f426ee96454ae6cc SHA-256: 68e10bd7bb9a45484817ccca57c47d1e092d7fae470e155d4e79e542489d6d8b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including ML and ClamAV, indicating malicious intent. It contains numerous embedded URLs that point to compromised websites and link farms, suggesting it's used to distribute further malicious content or phish for information. The presence of these links and the overall structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://allytemp.ru/uplcv?utm_term=as+you+like+it+by+william+shakespeare+pdf PDF link annotation
    • https://playindiano1.in/ckfinder/userfiles/files/buvetesudizodifesorobu.pdfIn PDF document text
    • http://rustproofingottawa.com/userfiles/file/91698977905.pdfIn PDF document text
    • http://educasters.co/ckfinder/userfiles/files/wedekegofo.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/70268288815.pdfIn PDF document text
    • https://weilaimachinery.com/userfiles/files/mamonixezokivepopep.pdfIn PDF document text
    • http://makassitools.com/userfiles/file///35283624047.pdfIn PDF document text
    • http://flywings.sk/UserFiles/file/53582978655.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/25274024452.pdfIn PDF document text
    • http://skupka54.ru/upload/m/weduxugokatexowizafot.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/55098642095.pdfIn PDF document text
    • http://vikingpaint.com/user_file/file/goxaluk.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/634951d44ca4c9b0124a243919b0b781/tafidetekuruxe.pdfIn PDF document text
    • https://augsburger-dartliga.de/uploads/file/92654487776.pdfIn PDF document text
    • http://stihoplet.by/upload/editor/files/42277231903.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/32653344660.pdfIn PDF document text
    • http://sjanzee.nl/file/tipufemosezigo.pdfIn PDF document text
    • https://hoangnhataudio.vn/media/files/pitorelatadutipap.pdfIn PDF document text
    • http://world-green-hope.com/uploads/files/14618158337.pdfIn PDF document text
    • http://bongoes62.dk/userfiles/file/ludulapewoxugafome.pdfIn PDF document text
    • http://klimagra.pl/images/wysiwyg_img/file/41498866067.pdfIn PDF document text
    • http://image.dlib.vn/libedu/news/bachviet/20210926/file/wifaxurujubenesogafo.pdfIn PDF document text
    • https://vipbeachhouse.com/uploads/editor/file/21332727380.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614722d61e2c4---gujiluzekinuf.pdfIn PDF document text
    • https://madeirashopping.com/userfiles/file/26211839987.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/a1c718098eee667c6a927a661539856e/58947875269.pdfIn PDF document text
    • 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_off0000c0f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0F1 11172 bytes
SHA-256: 3ec21bc37f0b7d5010fef89f1f03ea9f651f2faf8ae2f920af3c8c549ce3ed27
font_01_sfnt_off0000daf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAF7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF309 18480 bytes
SHA-256: cbe39629cf445455afb8dbbe6f27155587f947c6ffb4f8d88e9486a967471e86

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