Malicious PDF — malware analysis report

Static analysis result for SHA-256 062ed35e6d21cb74…

MALICIOUS

PDF

82.5 KB Created: 2021-08-20 03:02:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: e6c832e9d793b73614963c0d1269f44a SHA-1: 82a4a349433dd1994e3946804df62ca8fb8f4757 SHA-256: 062ed35e6d21cb746bed4e592ae9c87b94e3b9e75b0a7d027d546abd79b9bcc3
164 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 http://imaginove.eu/data/Files/37915896958.pdf In PDF document text
    • http://raczcsalad.hu/files/mamexo.pdfIn PDF document text
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/879885400d393e13aae865a04a8908b3/58443914069.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/caf6896c602513ba84ce4222d2b20384/82315930155.pdfIn PDF document text
    • https://macauroommate.com/ckfinder/userfiles/files/soxeg.pdfIn PDF document text
    • http://rajhansnursery.com/userfiles/file/nomakonoworolilapeb.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160807996506d2---21039681279.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/13ebf30df54b0fd5625be668986be9da/39430032614.pdfIn PDF document text
    • https://www.autopsrus.com/ckfinder/userfiles/files/75849071799.pdfIn PDF document text
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/62ggq1fpg2k10b1ag1qmemtepp/jijajesasukamononuwuw.pdfIn PDF document text
    • http://faradtvandor.hu/picture/userfiles/file/58144827745.pdfIn PDF document text
    • http://hrdiborice.cz/erucom1/files/files/limolabu.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c3f1624e55e---92248344345.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/15a9d19f76c58a9060016d7ffad037f6/7326373623.pdfIn PDF document text
    • http://namuvaldymas.lt/userfiles/file/wigubujinavawajifosumasud.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/dcc1be373ebb93696672fba372db8e4f/medutev.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16071c36304391---18901871294.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/4bcfb67ca8f9a29012a78be6b5301309/solaregorazusovubakato.pdfIn PDF document text
    • https://media-get.ru/userfiles/files/rewelodepabaj.pdfIn PDF document text
    • http://monticellotownship.org/userfiles/file/18946134610.pdfIn PDF document text
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/48647367965.pdfIn PDF document text
    • https://evrenmentese.com/upload/ckfinder/files/jopuxaxulinile.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/m17m750sl4fge719cjff7saupt/32309003823.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b82fff5aa8e---90625709943.pdfIn PDF document text
    • http://podwierzba.eu/ckfinder/userfiles/files/nasewupizenozafebut.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/ac12d873ecc597c412809025db4b7cf5/34718219147.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+reset+netflix+app+on+sharp+tvPDF 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_off0000dd67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD67 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f57e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF57E 10700 bytes
SHA-256: 97893bd40349aae1316c1deca8051f2d027be5cb7560d09f38d646c17120dba8
font_02_sfnt_off00010e06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E06 17664 bytes
SHA-256: d67c94eb451682c24ceccbef780967e84436bdf534a57780f379dd874734ea81