Malicious PDF — malware analysis report

Static analysis result for SHA-256 004fcee7cbc82f9b…

MALICIOUS

PDF

88.5 KB Created: 2021-08-08 14:43:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 827c2edf624bbd11629fc4bdd94c1daf SHA-1: cc863b673d60de29fd2c340278cae74a6b32645b SHA-256: 004fcee7cbc82f9b170dcf03d08bb671bb4c852a0a97ac0cb8bb1ee063ee34fa
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and other disposable hosting. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://catamma.ru/uplcv?utm_term=zeny+twin+tub+washing+machine+instructions
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/bc15ee7098651143a632c5249c40562d/nosuguzadofunujezili.pdf
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/oiq1or7dhbac8huhpsh3lqps3b/32704722245.pdf
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070c0da76224---62291531797.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607d68e87572d---92764932258.pdf
    • http://bukvoznaika.ru/ckfinder/userfiles/files/45040297028.pdf
    • http://17njl.com/userfiles/files/xetokes.pdf
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/8584d216f9834e35db3eb134781d0727/1475523249.pdf
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/22b96a70141bac006f9e6b7dd55ecbfc/xexexonironama.pdf
    • http://asirakademi.com/resimler/files/36356187416.pdf
    • https://cuisinescartier.ca/upload/editor/file/lowifekalenuto.pdf
    • http://granite1962.com/clients/869125/File/zaviwudevitukukubesaguv.pdf
    • http://stellarvvv.ru/ckfinder/userfiles/files/6508882590.pdf
    • http://global-poseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606caa166ae81---nilitato.pdf
    • http://abwingsbuffalo.com/uploads/files/8408785355.pdf
    • http://natur-pet.cz/webpagebuilder/ckfinder/userfiles/files/tosuvoxota.pdf
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/02e24d5fa641eb86191c6da7f936d1a4/24216408325.pdf
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e158b31f79---nasumopegebasudi.pdf
    • http://pronobile.de/catalog/file/65833426033.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607920767f713---56422301620.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e8d697139---dajuzibekosumudesux.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607e10f1c62d0---66134113709.pdf
    • http://www.jokilaaksonratsastajat.fi/file/tunere.pdf
    • http://maasmartcity.com/userfiles/file/mejoxefanalukiviluvusu.pdf
    • http://hani-bee.com/userfiles/files/baxuvazomaletunum.pdf
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/d8ld5psh6iv8m49if6alcopd72/marazajuranunotononuxonaf.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f59a.bin
c1b357b144057d3a19276963d3c2b7706e574f4702dd20db0b1d51bac4ec2797
pdf-font-stream PDF embedded font (sfnt) at offset 0xF59A 11032 bytes
font_01_sfnt_off00010f39.bin
cf111555d582ba3b028e2673660cde7df7aa4832e89eaa7227eb929374d17385
pdf-font-stream PDF embedded font (sfnt) at offset 0x10F39 16944 bytes
font_02_sfnt_off00013b77.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B77 16792 bytes