Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d506134911f0042…

MALICIOUS

PDF

91.7 KB Created: 2021-09-03 02:43:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: f3755093b853f06b9d67ef6860565df7 SHA-1: 5f39fe296861fe95a43bc3b97e2d74c865c813bf SHA-256: 6d506134911f0042e9f6ab35f41655576b35c13e9dbc90c31a1a5accbcb044f2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded URLs and the PDF structure strongly suggest it's part of a phishing or malware distribution campaign.

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://coretry.ru/uplcv?utm_term=types+of+camera+lenses+pdf PDF link annotation
    • http://aimic.com/userfiles/file/84242477951.pdfIn PDF document text
    • https://windfreeklima.com/upload/ckfinder/files/73313381302.pdfIn PDF document text
    • http://proxima-design.cz/files/file/mogodarokumagajiferu.pdfIn PDF document text
    • https://fanaf.comarticle_ressources/file/dokuxarakumivixoxe.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/c549cc4e7f715c6c6b17c38b8930deea/dinepigatasadedutuwez.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16084ef9acba07---82599392788.pdfIn PDF document text
    • https://aiaciran.org/cache/fck_files/file/kosalugabilat.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/zaxusigujokone.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/58aa3a405b1192a95fc35b6d1950de3b/xetukagefilogabopi.pdfIn PDF document text
    • http://hcvitamin.com/webroot/img/files/96970462195.pdfIn PDF document text
    • https://glbtrader.com/userfiles/file/luwafalat.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/74129cc014fbc876726c6ea8bbc7436d/nisijovapejiluxotob.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/kamasez.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/26443294484.pdfIn PDF document text
    • http://guilfordvikingsclassof81.com/clients/4/47/479b0a304b4cdce99dfe3eda73a59016/File/lelaxedemafirejed.pdfIn PDF document text
    • http://dpsszczytno.pl/photo/file/fagogixubujipexo.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/d941a378872ef7668e87be36bbf19c16/fesovuloxobamilowilanega.pdfIn PDF document text
    • https://drddvichitra.com/userfiles/file/92768798115.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16072c75ae5861---womegodajexefu.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095d65b3a1e8---vigivijewosamulux.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/fujotusenudux.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_off0001021e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1021E 10668 bytes
SHA-256: dcf5866340b203d2e6225f45d8be18973863cf115f562e3b446c637f19306ddd
font_01_sfnt_off00011a97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000132a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132A9 18104 bytes
SHA-256: e7727a6756172e9194272a741971c978edae50d8dd85c4df1807b4debcb915d6

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