Malicious PDF — malware analysis report

Static analysis result for SHA-256 07ccc48204c7ddb0…

MALICIOUS

PDF

81.1 KB Created: 2021-09-04 10:47:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 11b41b18d8ecec7b671a88e16295dc0d SHA-1: 811c03500901b22ee02134590c39964d73e2acba SHA-256: 07ccc48204c7ddb0c08e44b00271037b0aac0ad015eef56b6eeb6f38775d9786
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. It also features numerous links pointing to compromised websites and disposable hosting, indicating a likely attempt to lure users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://hydrem.ru/images/file/31746086633.pdf In PDF document text
    • http://razzledazzleevents.in/userfiles/file/63791208591.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/d827556b736cc6748bd5e95e3eaed371/48746681734.pdfIn PDF document text
    • http://vtdsbinhthuan.vn/public/uploads/userfiles/file/nixigajovawolewa.pdfIn PDF document text
    • https://nutricount.cz/UserFiles/File/xibimeruwuxumevo.pdfIn PDF document text
    • http://hyunsin.net/userfiles/file/70679903517.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bc7544b5fc3---51839409246.pdfIn PDF document text
    • https://fivetc.net/uploads/files/dukakowisesewezul.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160908137bc961---25318528956.pdfIn PDF document text
    • http://cdhsalumni.com/clients/28864/File/33585472320.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16075525953c68---11637678711.pdfIn PDF document text
    • http://didopack.com/files/kukuserenilul.pdfIn PDF document text
    • http://shacklefordlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/64788257436.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/243d66bcb635ae03bd61c7083e13fbdc/mexidadoje.pdfIn PDF document text
    • http://teplorium.su/userfiles/file/murutukamuxobeboboloto.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078352b5c13e---dodufip.pdfIn PDF document text
    • http://staceyasp.com/UserFiles/file/18163928223.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb0673edd9---20293670114.pdfIn PDF document text
    • http://zhjpharm.com/upload/files/28416012391.pdfIn PDF document text
    • https://ratco-hardware.com/Ups/files/22647853783.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/qei1mqu1711ar4729qni5413t0/dewirorivozokega.pdfIn PDF document text
    • http://share-world.tw/userfiles/file/2239542270.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/85507239082.pdfIn PDF document text
    • http://teechart.com/uploads/images/files/23646869117.pdfIn PDF document text
    • http://bannails.com/fckeditor_userfiles/file/7830116473.pdfIn PDF document text
    • http://www.colormotion.cz/UserFiles/file/kotunirerivozogefile.pdfIn PDF document text
    • http://blow-w124.com/js/upload/files/70016138968.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=pdf+reader+java+examplePDF 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_off0000dc8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8A 10376 bytes
SHA-256: 056a6cd0835ac70876f7f4fa1d82d905b2d159c2d854a5f25888e758b45ab34b
font_01_sfnt_off0000f40c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010c1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1E 16596 bytes
SHA-256: b8303791651fc9e18713be9609258944197c04dab3bafd034ef4f80ff4cb812b

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