Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e1f6088ee5a9ad5…

MALICIOUS

PDF

80.2 KB Created: 2021-09-17 06:01:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: aaa08c78240e91a854e8715b2298b0b4 SHA-1: 2cf61c9f876be5057bf1077793cb0f3c85326842 SHA-256: 1e1f6088ee5a9ad59b45798656a513bee6808c21249f3944bc0d0c135c85eb08
196 Risk Score

Malware Insights

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

This PDF document is flagged as malicious by ML classifiers and ClamAV, exhibiting characteristics of a remote support tool lure. It contains numerous links to external websites, some hosted on compromised WordPress installations, suggesting an attempt to redirect the user to malicious content or download further payloads. The document's structure and embedded URLs indicate a phishing or social engineering attack aimed at tricking the user into installing potentially harmful remote access software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://catamma.ru/uplcv?utm_term=how+to+cast+phone+to+laptop+using+usb+cable PDF link annotation
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/add208db7f7452a126eb3744703fd031/56433425897.pdfIn PDF document text
    • http://magendans.com/imagefiles/file/dowerumaju.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142f6602f1b0---texovijaniwutasidapute.pdfIn PDF document text
    • https://calson.garment-pro.com/ckfinder/userfiles/files/vuwup.pdfIn PDF document text
    • http://assotechne.eu/userfiles/files/ladivoxakadodoxisuve.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/9235195229.pdfIn PDF document text
    • http://bjdfszwy.com/filespath/files/20210904005500.pdfIn PDF document text
    • https://digireg.lu/upload/kixepolipumixajava.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b09f75afd4---fodekunixuwimomegi.pdfIn PDF document text
    • http://stroytehcentr.ru/images/file/63169434216.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/safajonefuf.pdfIn PDF document text
    • https://tmtteks.com/files/4144390049.pdfIn PDF document text
    • http://saigonradio.com/userfiles/file/62453890959.pdfIn PDF document text
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612f804cc10f9---65634152772.pdfIn PDF document text
    • https://lemarko.com/userfiles/file/meponopasifaxafo.pdfIn PDF document text
    • http://worshipedia.net/sites/default/files/file/lalirejexakuralewemupuf.pdfIn PDF document text
    • http://ptktent.ru/userfiles/file/63565930675.pdfIn PDF document text
    • http://emilygrilltogo.com/uploads/files/94549259314.pdfIn PDF document text
    • http://suachuaspa.com/upload/images-content/files/sikufus.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/lorugofitizebaj.pdfIn PDF document text
    • 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_off0000d4a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ecc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC0 10872 bytes
SHA-256: 714302e2b7c0a5b2a4e50d871ee1d908f604a3eea637bb756d2dbb4b50e15d4d
font_02_sfnt_off000105a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A0 17544 bytes
SHA-256: 964066754a8717fa222d33746c25de3b52f5f7dc3bb4ff09c7db5b2fe8ab6699

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