Malicious PDF — malware analysis report

Static analysis result for SHA-256 faea42661ea571ba…

MALICIOUS

PDF

82.0 KB Created: 2021-10-07 17:00:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 4afd8a249ee7499747e942cdae5a273b SHA-1: 997ca3d63f5b406b8ab31318b8615059c971f976 SHA-256: faea42661ea571bae433f37f551feed1b508d28708f1a6dc64efed7996b43bf2
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The file is detected as a malicious PDF by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains numerous embedded URIs, including one pointing to a raw IP address and others hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of a QR code lure further supports the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://dohertylaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tosenixezeta.pdf In PDF document text
    • http://kanoonkaraj.ir/dbmanager/filebank/htmlgallery/file///36574234267.pdfIn PDF document text
    • http://noavarservice.com/ckfinder/userfiles/files/7436952977.pdfIn PDF document text
    • http://tieuhocsondong.hoaiduc.edu.vn/ckfinder/userfiles/files/repere.pdfIn PDF document text
    • http://teakdeck.pl/files/file/rusijasojaferevajog.pdfIn PDF document text
    • https://www.sonorisation-auxerre.fr/ckfinder/userfiles/files/78135908139.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16138df0a90e42---lesegobaxumewigaletozom.pdfIn PDF document text
    • http://manavpublicschool.org/manav/userfiles/file/lumojafarerujef.pdfIn PDF document text
    • http://usmleworkout.com/files/file/tasofakekemanexuzuditiza.pdfIn PDF document text
    • http://emusicmarket.com/upfile/board/files/sojuvebek.pdfIn PDF document text
    • http://gavinlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/93483707502.pdfIn PDF document text
    • http://tw-echen.com/uploads/files/202109131749521159.pdfIn PDF document text
    • http://alexdisinfestazioni.com/userfiles/files/74814957912.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/v5kahvml25rtnm3up49v1iv625/14746669527.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1615a392c5c0c8---94104117108.pdfIn PDF document text
    • http://savalis.ru/userfiles/file/31793479495.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/161512b4955ed4---48951961050.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/kikowujojusobikejigi.pdfIn PDF document text
    • https://tasivn.com/upload/ck/files/93471625581.pdfIn PDF document text
    • http://studiotecnicolamanna.com/userfiles/files/tejebujiduzubiregokove.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/29029518128.pdfPDF link annotation
    • http://air-separation-supplier.com/d/files/rewituvanigizodolurupa.pdfIn PDF document text
    • http://www.ccengis.be/applications/ckeditor/addons/ckeditor/ckfinder/userfiles/files/93258478609.pdfIn PDF document text
    • https://kstraders.com/userfiles/file/muwozibunuturaw.pdfIn PDF document text
    • https://tutorbolivia.com/userfiles/file/88525542235.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=dry+white+wine+for+musselsPDF 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_off0000db9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB9C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B3 10616 bytes
SHA-256: 6f7c381bd0d2a02f88499d5f25a83855e9467f933392cd49dfee75f8c19c1997
font_02_sfnt_off00010bde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDE 18392 bytes
SHA-256: 0700f9eba253f97130783af3fff0e202576c88e82659c8678956f5b1c0af5cf2

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