Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b49c203286f65ab…

MALICIOUS

PDF

87.3 KB Created: 2021-06-30 02:22:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 9315c5fa4fe4440f1e78b1692c64bf78 SHA-1: b6c9efe7c9ef8606b8e454678931151435872992 SHA-256: 6b49c203286f65abbead16cee013b5e2a416160d712ad52932613f6f6352bc24
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file is identified as malicious by ClamAV and an ML classifier. It contains numerous links to external PDFs hosted on compromised websites, suggesting a link farm designed to distribute malware. One URL specifically mentions 'clash of clans mod application', indicating a lure to trick users into downloading malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://40parables.com/wp-content/plugins/super-forms/uploads/php/files/85103fe9fc5fc5285f09561a9ae2ed69/34846354998.pdf In PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/f33a361405069e8c7074a3937ddde6c1/8174457051.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/f6e0801a4b9d9bda32d433cd902b1f54/70744216738.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/9c6686b2f2efe8c900b7a52c638d26b4/17023210336.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/rofuvoperifodu.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad8f15e436b---libapefaxuvalizebisekol.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160847727443fa---nimosofonisa.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/33282026988.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/f81bbddb9eb243627c3309745db4c832/vakopusuridigedesegunu.pdfIn PDF document text
    • https://dpmceramiche.it/file/vikigunipukuwanofaresoje.pdfIn PDF document text
    • https://baobihungphu.com/media/ftp/file/rusazogojodezinimawirapug.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/fe2lsqrjvdksb9disr7jqt4avi/zagipi.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b58a9d1b23a---vuriwazorakekobomufawedo.pdfIn PDF document text
    • https://kogan-photo.ru/wp-content/plugins/super-forms/uploads/php/files/6857d5f81db259abe247d73a7c83d4b5/bijesapilexuz.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/13d1a0d753dcb7b0ede3f2c670aaceb8/16750299426.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/83391120598.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079de6259e4a---7666069029.pdfIn PDF document text
    • http://www.peretprod.ro/content-images/file/zogarefu.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/23326084437.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608735384c08c---luvufedarewufowino.pdfIn PDF document text
    • http://pusancard.com/userData/board/file/tifutusejux.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/bafddbc576f7c8378c9f49e1a2002b91/38363390032.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=clash+of+clans+mod+applicationPDF 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_off0000ee71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE71 10684 bytes
SHA-256: 188c7b3ac62f461e402fa734b9c932ed8c5a57a492b4f89c688918dd5d8665cd
font_01_sfnt_off000106b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B3 18852 bytes
SHA-256: beae5190d64528206b0d7ac21e3a61b3926a3bcbec703ae4f83a3c09d48afd4c
font_02_sfnt_off0001362f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1362F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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