Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcbc120ca2017237…

MALICIOUS

PDF

86.0 KB Created: 2021-08-31 11:47:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: bfb5e15d14f2e320029448864503612e SHA-1: 06e33dc9f985d82814a4e690a269f64ff96bc658 SHA-256: bcbc120ca20172374d492caaaa59cca825035804e751940b7758675a5a0e48ef
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to numerous compromised CMS upload storage locations and disposable hosting, indicative of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly support its malicious nature. The primary goal appears to be directing users to external, potentially harmful, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://rabudiagnostic.com/userfiles/files/10656571061.pdf In PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16090bf9fa2950---rofenokakaxedugejawezaj.pdfIn PDF document text
    • http://akademibt.com/resimler/files/39419380889.pdfIn PDF document text
    • http://haenuri.net/ckupload/files/limuvexevekumiruwewigi.pdfIn PDF document text
    • http://bartuceviri.com/userfiles/file/sotatovedowaxilabiveg.pdfIn PDF document text
    • https://wupaojichangjia.com/d/files/40976901932.pdfIn PDF document text
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/59jb5goh766ir7pr83iv14s1at/favuwofaneke.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160ed941be70e9---38983557612.pdfIn PDF document text
    • http://roanfamily.net/clients/0/01/01b24a6c100194bbc8678883f3cd4a53/File/6005402001.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/88524807945.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c24cb1da1---57868955658.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16090bea93f219---selinowe.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608303574aaf6---sakusudusolofi.pdfIn PDF document text
    • http://leadingedgecorporate.com/user_images/file/94864817939.pdfIn PDF document text
    • https://motacademy.it/file/86200192102.pdfIn PDF document text
    • http://kowalstwwo.pl/public/cms/images/file/botopuropasuzagetid.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/a4bu3campapmi7p7ums4rdl96n/vopelax.pdfIn PDF document text
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/jiseluxevusewujadilifi.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/16097203f1bedc---zuvukugasixuvezuwixawo.pdfIn PDF document text
    • https://pinkrali.com/calisma2/files/uploads/rutijikekivob.pdfIn PDF document text
    • http://allasclub.com/campannas/file/tosawirerorigesovituzono.pdfIn PDF document text
    • https://dentalrud.com/userfiles/file/15873335797.pdfIn PDF document text
    • http://osrclass1967.com/clients/8/84/84e84eb3bb32f45446e669e24fea3ebc/File/66817512725.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160aa7460b9269---xolefijajetivofikesiruz.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c909bc6e65---koruvunenaru.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=cry+baby+dancePDF 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_off0000ecce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCE 17612 bytes
SHA-256: 8df6f0d980b5cf259fb5d770b42a0ebcee1ee1b0ef04fb1bdd92c792a02b8212
font_01_sfnt_off00011b2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B2C 10124 bytes
SHA-256: 58eab97982f3bb447a2b7e2146506027f0760f4b6e725ae61720de07ec194b93
font_02_sfnt_off000131e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.