Malicious PDF — malware analysis report

Static analysis result for SHA-256 a95c2e70a1f926fe…

MALICIOUS

PDF

74.1 KB Created: 2021-09-17 14:12:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 7e7e8b7cef315ecbbab232fe699e7de4 SHA-1: 65a21eca81d76990a7de5d2baac0830528187586 SHA-256: a95c2e70a1f926fe93a8052972f9676609d06e074538ad78ef13234ba2cedd65
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is identified as a link farm, with many links pointing to compromised CMS upload storage. ClamAV detection and ML classification confirm its malicious nature, likely as a phishing or redirection tool. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an attempt to manipulate search engine results or direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://archism.ru/uplcv?utm_term=geeta+in+marathi+pdf PDF link annotation
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f3e5934504---70950293544.pdfIn PDF document text
    • https://llibreriaha.com/img/events/file/gusafubizemivawipe.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/a7ndalr3uvdb3a39bu1go2lch4/fulositen.pdfIn PDF document text
    • https://rireenfrance.com/images/upload/files/putufasitemiziwogeg.pdfIn PDF document text
    • http://orthodoxnews.us/file/puwil.pdfIn PDF document text
    • http://holdemigny.fr/ckfinder/userfiles/files/sapogibavuje.pdfIn PDF document text
    • http://xinxinhouseware.com/uploadfile/files/jokolujafunemexaza.pdfIn PDF document text
    • http://forglory.cz/ckfinder/userfiles/files/siwawuloxopanizeta.pdfIn PDF document text
    • http://dc-a0dcf319a153.breakthroughsport.com/userfiles/files/98033243395.pdfIn PDF document text
    • http://hungbuloon.com/media/ftp/file/puguluboditasodaxit.pdfIn PDF document text
    • https://tahitotfaluovodak.hu/ckfinder/userfiles/files/tanuvapurixusabexixa.pdfIn PDF document text
    • https://riosemarescentrodemergulho.com/ckfinder/files/mepilomefimubuganonofeb.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/5362e199cc46c17889a071af26aaad44/rufivasomozezuzudi.pdfIn PDF document text
    • http://www.elstar.ru/uploads/files/25961284587.pdfIn PDF document text
    • http://cukrarska-vyroba.cz/UserFiles/File/65577336429.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/84981659535.pdfIn PDF document text
    • https://sanaspinler.com/calisma2/files/uploads/gikow.pdfIn PDF document text
    • http://eptesteplelek.com/uploads/file/6591021352.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/35295bb8f7c700b847defb903c57f3ef/gogilunejizezinisifo.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1613df398bf50b---vaturafabumakewerivi.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/63192230265.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/n5kstv0dic38nhm1oq22cb3vq2/6274310159.pdfIn PDF document text
    • http://kite-surf.sk/files/60429260239.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1613607313ec9d---virafagu.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.fr/userfiles/file/buguxop.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_off0000be78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE78 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d68f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD68F 10468 bytes
SHA-256: 8043d5442e534cb7cb7d8e9075092aa9f1549c58a5ac6d35bc67b5dccf4295da
font_02_sfnt_off0000ee0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0B 17384 bytes
SHA-256: a32f26e3255ae748681dc5e58ef9768044a00c0e9cf550417f3151698579a5ea