Malicious PDF — malware analysis report

Static analysis result for SHA-256 fce776584a0fd317…

MALICIOUS

PDF

80.8 KB Created: 2021-06-28 12:43:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 236990ec33e5d464186275619311cce9 SHA-1: 30ad499fec8e476ee0bbe83280748be6ca03b437 SHA-256: fce776584a0fd3176db2954c7d0b243664f7ab63b58e1d10aad1047a3bfd00c5
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The primary URL, https://drafthe.ru/uplcv, likely serves as a landing page for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://drafthe.ru/uplcv?utm_term=amplifier+song+download+mp3+pagalworld PDF link annotation
    • http://myjobcareer.net/userfiles/file/2021052507252573499.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094b3416d9d8---53706930071.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/nawefu.pdfIn PDF document text
    • http://renovator.cz/files/file/xadezujativevowuxesafen.pdfIn PDF document text
    • http://skupka23.ru/upload/m/wozoxosinobaja.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ab4bc067b55---sajisagatimanigexa.pdfIn PDF document text
    • http://rivieahk.com/clients/5/51/51325344bd1517f257d6959d5350918e/File/6893509869.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/ln54av2dktudh8rt6la6ktu54k/fotepi.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/86529479324.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/tuxefizaxovewizururu.pdfIn PDF document text
    • http://digifast.cz/userfiles/xuboregadirab.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/eb493357af34bd10efbaa44707d42376/sizutusovijutavavu.pdfIn PDF document text
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/8qcihlqqqqocsd8nbsfclh8bp0/jomasogana.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b7df18847f---nupenu.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/kadisesixeli.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/52c093b53ad03450474849c68c28af1a/60880715567.pdfIn PDF document text
    • https://bahia-group.com/ckfinder/userfiles/files/98294189298.pdfIn PDF document text
    • http://campbellelectronics.com/uploads/budakonuxo.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/dirudafufomumuxomedine.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/628427ba1ade2d35004029e0ace01ab0/wudimusewovin.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e1da75519---8058833278.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/vigano.pdfIn PDF document text
    • http://demkapi.com/resimler/files/lasefoxijupaputapez.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/b8ba5k7bo4i51ppp6jq86if2dp/63682031321.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/24650779924.pdfIn PDF document text
    • https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3b90da084---91573531268.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
stream_002_off0000d6fa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xD6FA 17232 bytes
SHA-256: 8bf32774f9149c1d5770452e997ceb95941b3fce832027b548e20bcbe8fd4d08
font_01_sfnt_off0001044e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044E 10984 bytes
SHA-256: d6b39c20a9a6ab4ad1b80004a568f036faf6ff27d5b566d896664d3104cc8908
font_02_sfnt_off00011d9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D9A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1