Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f068406c03aa0a7…

MALICIOUS

PDF

73.9 KB Created: 2021-09-12 22:55:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0b2b174fddc0611833c5b2822553d249 SHA-1: 097459ec528e1100d09e7631e821dad78a450cad SHA-256: 6f068406c03aa0a7290082df6d7134f3147e87deb0adf1cfab4d7eaa32248163
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable domains, indicating a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The presence of multiple compromised CMS upload links further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

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://coretry.ru/uplcv?utm_term=awesome+tanks+4+unblocked PDF link annotation
    • http://namadagaskare.ru/ckfinder/userfiles/files/miwudedofapenag.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c39cb7d273---puralosu.pdfIn PDF document text
    • http://vamaconsulting.sk/userfiles/file/juladujuvani.pdfIn PDF document text
    • http://evohome.pl/userfiles/file/72683746708.pdfIn PDF document text
    • http://whatifitspossible.com/ckfinder/userfiles/files/tujugekabusaxejuvisakabos.pdfIn PDF document text
    • http://balletpanov.com/uploads/files/86295026453.pdfIn PDF document text
    • http://giustizianuova.it/userfiles/file/92831035253.pdfIn PDF document text
    • https://kolbandibileklik.com/resimler/files/90637138319.pdfIn PDF document text
    • https://khmernative-rice.com/userfiles/file/25527499939.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/161382f5d20d66---36867415532.pdfIn PDF document text
    • https://kenadong.com/contents/files/91427041070.pdfIn PDF document text
    • https://rentcar888.com/uploads/files/202109011227306587.pdfIn PDF document text
    • http://csaladiegyteruautok.hu/userfiles/files/panexatefabejamobubar.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/qsai3ae6ct21mruhegpiv66am1/wovotavokigege.pdfIn PDF document text
    • http://innersolutions-uk.com/file/9704099068.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/a040cfa433f712211953197b39210c68/jifamila.pdfIn PDF document text
    • http://taxiluzern.ch/khurasan/userfiles/files/radog.pdfIn PDF document text
    • http://uptownfallschurch.com/uploads/files/12519903915.pdfIn PDF document text
    • http://a-xian-coat.com/uploads/files/202109050822066117.pdfIn PDF document text
    • https://terminarz.online/kosmetyczka/krakow/files/vozuxugimunesabigefo.pdfIn PDF document text
    • https://iwanbim.com/userfiles/files/82170527087.pdfIn PDF document text
    • http://domadoma.cz/userfiles/file/loxepipoboveragurefuj.pdfIn PDF document text
    • http://kor-ra.ru/UserFiles/file/siborokenezefubikadepajo.pdfIn PDF document text
    • http://ace-pharm.com/upload/files/28023434879.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16133d2cb477da---pisamil.pdfIn PDF document text
    • http://dokturmice.com/ckfinder/userfiles/files/vojajofetesivagomagawipu.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_off0000c10f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC10F 10816 bytes
SHA-256: 755de2c1614dea3cfa9f589be786044c60b50a0de1414ebaeb94b2410e61662f
font_01_sfnt_off0000da2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f23e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23E 15688 bytes
SHA-256: e535d315e3437d13154c33b2d3b52a239c31df167f1ca18b5a9d42c2ee7a24f1

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