Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ace646b9fb284ec…

MALICIOUS

PDF

68.5 KB Created: 2021-09-13 21:23:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2a3ea609e71eac5940a14acb901de5dd SHA-1: 432fc89048e05b3b5fbe517a5d485e7485d53d16 SHA-256: 9ace646b9fb284ecc584f0cc86dd2b10deea1eb3c95319ff918d0139dfd68ac8
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains embedded JavaScript and is identified as a phishing lure. It presents a full-page image, typical of a screenshot, designed to trick users into clicking a link. This link farm points to compromised CMS uploads and disposable hosting, ultimately leading to phishing pages. The embedded JavaScript likely facilitates the redirection or execution of malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 https://senarathgroup.lk/assets/media/file/zezom.pdf In PDF document text
    • https://vietnamairlinescorp.org/js/ckfinder/userfiles/files/90713699679.pdfIn PDF document text
    • http://www.moyekolodin.com/files/tizofawikavek.pdfIn PDF document text
    • https://bepcongnghiepphuchung.vn/userfiles/file/12337398427.pdfIn PDF document text
    • http://paneldeconso.com/userfiles/file/6549594200.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613c97e5e13a3---rigafavenavafusado.pdfIn PDF document text
    • https://gilbertems.com/videos/file/wowepepogakegivudaje.pdfIn PDF document text
    • https://sysyanginguvenlik.com/uploads/files/36889657645.pdfIn PDF document text
    • http://aptekarynek.pl/zdjecia/fck/file/79662904464.pdfIn PDF document text
    • http://msnladyboy.com/ckfinder/userfiles/files/42018777039.pdfIn PDF document text
    • http://penzionnakrizankach.cz/ckfinder/userfiles/files/73900443096.pdfIn PDF document text
    • http://varosom.hu/userfiles/files/5188139280.pdfIn PDF document text
    • http://abdon.madteam.net/ckfinder/userfiles/files/74052810597.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16138d8958c631---baxezemafagepotoxoma.pdfIn PDF document text
    • http://dentish.ru/ckfinder/userfiles/files/renimoto.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/0090be841ac0f7d2f0fb0d8486324b2e/rarasotexevodut.pdfIn PDF document text
    • https://olamare.com/img/uploaded/file/pinitiwawivi.pdfIn PDF document text
    • http://tech-sub.com/userfiles/file/67552227082.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/lebuwabu.pdfIn PDF document text
    • http://borik.customreal.sk/data/files/xaxitasixokufovenomunub.pdfIn PDF document text
    • http://hotechike.com/files/files/62978936992.pdfIn PDF document text
    • http://acutecardio.ru/sadm_files/lanunatubibaz.pdfIn PDF document text
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/mamawovujetiditelijo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=roblox+legends+of+speed+codesPDF 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_off0000b1bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1BF 13932 bytes
SHA-256: 680afacb71f523b1874e89f40246cf312831e9cf116d0934e14af92703910330
font_01_sfnt_off0000d43d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD43D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ec54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC54 10628 bytes
SHA-256: f7bf1614f096b98800626a4e756f86e9088d651f94f100aea310291c4f5ce7c6

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