Malicious PDF — malware analysis report

Static analysis result for SHA-256 82cc22259a4dd612…

MALICIOUS

PDF

74.1 KB Created: 2021-09-06 01:19:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 6a357016e34a8ccefa6fd92b9cd3ed31 SHA-1: 3cccc1a87c026fd463d7a059e65f9655b8ea5c07 SHA-256: 82cc22259a4dd612c2c0ee9993a664bfcae87e8883400530769ea8a0bcc566e3
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document contains a link farm pointing to numerous compromised WordPress upload directories, which in turn host other PDF files. This suggests a multi-stage attack where the initial PDF acts as a lure or redirector to further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d218ee667---54575094723.pdf In PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a7cca8a6984---2333173817.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160869c6530f33---nezonevedawuson.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf99fa1145---dokawa.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d27d9bf49c---94761255579.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/gixewop.pdfIn PDF document text
    • http://limoride.net/gallery/file/11825701914.pdfIn PDF document text
    • https://mallncart.com/userfiles/files/93322810011.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/baganugiwow.pdfIn PDF document text
    • https://gberwanda.com/gbe/useruploads/blogs/files/55518538452.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077149e57619---838068934.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/a6udnb5dbnikua355jo387jou1/33798408207.pdfIn PDF document text
    • http://kirche-treuen.de/UserFiles/File/73597141501.pdfIn PDF document text
    • http://primebrokeragetx.com/ckfinder/userfiles/files/gofavu.pdfIn PDF document text
    • http://indyztyle.com/ckfinder/userfiles/files/fupos.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161312ac15f5db---jejuwinuzisosise.pdfIn PDF document text
    • https://protradingindia.net/userfiles/file/90483743676.pdfIn PDF document text
    • http://savalis.ru/userfiles/file/9970545144.pdfIn PDF document text
    • https://agenciaboom.com/wp-content/plugins/super-forms/uploads/php/files/g437n3ef7nu2e0dmv43c7lgpa0/rumatepoxon.pdfIn PDF document text
    • http://chemicalengineers.ie/images/74179644529.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16072bef04eab6---81516103166.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/sokujovedadarara.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/magatovevurenu.pdfIn PDF document text
    • http://happyland-nsk.net/ckfinder/userfiles/files/53888040604.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=actividades+inteligencias+multiples+pdfPDF 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_off0000bd86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD86 10892 bytes
SHA-256: f459729f1ec6440d6e0a0fc6029f7730bdb76ed8c3c8da873520d7c979979743
font_01_sfnt_off0000d687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD687 17452 bytes
SHA-256: e7dc7925f31c9e664a795b82baa519521257a4e28347fd00585c0bae2c76a11e
font_02_sfnt_off00010232.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10232 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.