Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c9f6d95fb1def98…

MALICIOUS

PDF

91.8 KB Created: 2021-06-02 10:12:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3fb5ba8f793a7d44c2c01cd29f2b1560 SHA-1: 9992430398796093cb25774b0011fa85acf39de8 SHA-256: 3c9f6d95fb1def9848a321ce1594e856b999f3f83b1e4b230504923769627014
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress sites, likely intended to distribute malware disguised as a Minecraft APK download. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious content, potentially leveraging embedded JavaScript for obfuscation or exploitation.

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 https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/iq1fkdrb4l9tkeerjnc05g5377/nemuzisivekubuwazifag.pdf
    • http://cfh2.com/clients/d/d2/d2a7b52150a7a947468b52e9b7560e3c/File/22811800592.pdf
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608162411b557---20740084433.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/471ede3d1c1d61cf3421bb075bfeb866/31995437144.pdf
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16072b38723d72---17393216989.pdf
    • http://curry-box-deluxe.de/userfiles/file/24180796413.pdf
    • http://alpha-th.com/userfiles/file/89331118831.pdf
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081c8624927f---zezetamogubaf.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/c7323f4ac15d936ea180b725328f1247/kezegapejajudobutisile.pdf
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607cab48af1d0---55949273115.pdf
    • http://pspectr.ru/userfiles/file/85779554695.pdf
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160890854d2ea7---25672526856.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ab0fadd00d0---tonazugojegure.pdf
    • http://elite-nails.pl/Upload/file/dazuwukafusuzurilajot.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609a9bac744b8---dojirizajikazuwifov.pdf
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b83fb3fa28---93141177093.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=download+minecraft+pocket+edition+0.16.0+apk
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://www.gnu.org/licenses/gpl.html
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f317.bin
cf441299e2803fa0e3fc536e2a6eb3103eb46409e24b2879e9a72a2ae18bc6da
pdf-font-stream PDF embedded font (sfnt) at offset 0xF317 3080 bytes
font_01_sfnt_off0000fe17.bin
267a2a67c86b554325ae5aa6f8017db9656a33f41c83374faa19f2521cf7b0af
pdf-font-stream PDF embedded font (sfnt) at offset 0xFE17 5660 bytes
font_02_sfnt_off0001115d.bin
ce7686e0404ce87d58e7368c758cca6eb33cc4803b1f41c30f84cca575d489b8
pdf-font-stream PDF embedded font (sfnt) at offset 0x1115D 6764 bytes
font_03_sfnt_off00012363.bin
51c8816ef72cae9e81b25bcdf3af22bd0610dd16fa1f685c7672f3c0cffd51c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x12363 11576 bytes
font_04_sfnt_off00014ad6.bin
f57b8bacbff4c3a56147d857cf5bf63457ad809b9b0cef38803851f720eb64b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x14AD6 16252 bytes