Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6d2ff6931b01041…

MALICIOUS

PDF

86.3 KB Created: 2021-06-27 02:10:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: e9a7736311651c95b5be6cf93ed77e73 SHA-1: 5cf9938d34131ca60cb32e372f3073b6de0bfdf5 SHA-256: c6d2ff6931b0104122f68369e92a1dd9cf679a1a8098fced2ff598a82e578c95
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The presence of these links suggests an attempt to exploit users through phishing or to deliver further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 https://huntic.ru/uplcv?utm_term=chart+from+table+confluence PDF link annotation
    • http://berrybucs1973.com/clients/3/3a/3a2d6910be1067feaf6dc79f90d505e0/File/zimujimokokovatim.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee137a5a71---tedoravutiladawik.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6331b29c7a---20751267349.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2139e4a540---52881046886.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/386284c6cf37c881c54754e14ef1be55/44910277119.pdfIn PDF document text
    • https://baigiangtoanhoc.com/upload/files/sulofafatodezivifabotex.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/160bf98ec20c09---19646690763.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/a2b009163ab441a67cec177930bc478f/jevovesizafatom.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/f84fa41ec7765113e276beaee44bfd0c/80595840477.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/a2mvji54gsjjvsgbv3dpa6r62v/73014167357.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/iagqasgdk454huq71n2hj3hobf/97986330506.pdfIn PDF document text
    • http://sakaryakasaplarodasi.org/userfiles/file/vogikit.pdfIn PDF document text
    • http://dermatologomiguelgallego.com/miguel/fck/file/72771322305.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080a7efb3290---86236767684.pdfIn PDF document text
    • http://goraku-sangyo.com/userfiles/file/2916854064.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/43425704828.pdfIn PDF document text
    • https://appfacile.it/file/27729570096.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/nbtbijecg0sbunuu61a9cofsra/27589002698.pdfIn PDF document text
    • https://xo-sound.ru/userfiles/file/91487453582.pdfIn PDF document text
    • http://solamsys.com/userData/board/file/40510106141.pdfIn PDF document text
    • https://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/6illg4n3i1irkfl67n09sqhi27/nozugofodusovawir.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/ceqg5lv5ek02aioajacqog873v/21213810101.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/54696322389.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_off0000ed01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED01 10612 bytes
SHA-256: 61f7d238b6b56cf66bedffce40126dd5343c960d1be1863e86fe7610de453f3d
font_01_sfnt_off00010521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10521 17728 bytes
SHA-256: d6a9ef88655514d41930306caf6c42acfab71235e0d049aed8a39cd6349f5ae7
font_02_sfnt_off00013407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13407 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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