Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f01c27968a42019…

MALICIOUS

PDF

98.7 KB Created: 2021-08-23 17:38:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 91bebd50fc5f690df2c93d6df3403fdd SHA-1: 7688ddd74761522d83d3ec9a59ae535a71d8f900 SHA-256: 8f01c27968a420197480e35feb8a5312905139de55eb8b328949caeb39bfeedb
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to websites hosted on compromised CMS platforms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple link farms and compromised upload directories suggests an attempt to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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=watch+columbo+full+episodes+free+online PDF link annotation
    • https://nikosdimos.gr/userfiles/file/82921197430.pdfIn PDF document text
    • https://drnanemilk.com/tctt/sites/aaa/file/15797486780.pdfIn PDF document text
    • https://ost-fogging.com/upload/files/49134283764.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16083c7e8ed2de---39516755021.pdfIn PDF document text
    • http://greenhousehotel.vn/uploads/image/files/lalepovidolasevarur.pdfIn PDF document text
    • http://anadarkogomezfamily.com/clients/7/76/76920377ef4e0cfe2c6e77079a05cbd4/File/95997921805.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/2b68l47d4ipb2cehkb9qmo4sh9/22295420439.pdfIn PDF document text
    • http://aktifimmo.lu/userfiles/files/6812301175.pdfIn PDF document text
    • http://dlikefulproductions.com/clients/875850/File/93306776609.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/46n9dqukorbdbdf0r8rcfl078a/kegodarurotexedoruzu.pdfIn PDF document text
    • https://implantsdentairesdesmoulins.com/upload/editor/file/25848985663.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021082322095844.pdfIn PDF document text
    • http://uniquehotelsolutions.com/files/others/76430878034.pdfIn PDF document text
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160861d021185c---timosezetawikafal.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b07c1a18f63c39e3798363a32439b153/27251390976.pdfIn PDF document text
    • http://duepassidalcentro.it/userfiles/files/pebozanoguvivawuvorov.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d692136b4a---verefe.pdfIn PDF document text
    • http://www.cbs-emballages.com/upload/file/51255155087.pdfIn PDF document text
    • http://romangruszecki.com/uploaded/file/molaxolamukoxevuzuxu.pdfIn PDF document text
    • http://tdbakademi.org/userfiles/files/3664546276.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b55cee5addf---wesomafapejejuw.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/8e1j34k4movmsb9l8ef3d4t34p/pabazivubimovolukoti.pdfIn PDF document text
    • https://www.rockandroll.blog.br/wp-content/plugins/super-forms/uploads/php/files/hv4ni34je0jg8t5gpjhhdv20dm/45299469877.pdfIn PDF document text
    • http://infoegrafica.com/userfiles/files/57573812300.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_off00011a66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A66 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001327d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1327D 11120 bytes
SHA-256: 6342bde09be1b2211486076eff97fb9d24e9bc13f42bac234b31582c9ad954e1
font_02_sfnt_off00014c04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C04 18632 bytes
SHA-256: a3b315c0c0090051ecba9776683654bf7b20acfddff230b3828784c5ce0b4998

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