Malicious PDF — malware analysis report

Static analysis result for SHA-256 df0eeab7ceaf6795…

MALICIOUS

PDF

70.4 KB Created: 2021-09-29 10:46:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 478b1c250fb2a54b5d20bde08fa1ec89 SHA-1: 207dda4d8cac98c6824a30678c3dba3610c72687 SHA-256: df0eeab7ceaf6795b6ba10527436bfd4af15211697e48b043262aed5ef1a0e60
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to compromised CMS uploads and disposable hosting. This indicates a likely phishing or redirection attempt, aiming to lure users to malicious content. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://wastran.ru/uplcv?utm_term=best+sites+to+watch+new+movies+online+free PDF link annotation
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a93577bb0f---xibokuzakugamagojazoxoda.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161429e6346944---depokogavunebiridewud.pdfIn PDF document text
    • http://www.emploi.nat.tn/ckeditor/ckfinder/userfiles/files/75565451372.pdfIn PDF document text
    • http://sunpix.ru/img/lib/file/91938093042.pdfIn PDF document text
    • http://audiohrestomatiya.ru/content/file/97350900625.pdfIn PDF document text
    • https://memorybg.net/app/templates/js/ckfinder/userfiles/files/suvulanowuguwisebowa.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/murez.pdfIn PDF document text
    • http://badgerhillfarm.uk/71132807700.pdfIn PDF document text
    • http://seattlebestteriyaki.com/uploads/files/42550511690.pdfIn PDF document text
    • https://vanrun-it.nl/userfiles/files/47758857503.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16151b4626a31a---toxexaguxanumeju.pdfIn PDF document text
    • http://makinsushi.com/uploads/files/pezap.pdfIn PDF document text
    • http://gr-chem.com/upload/files/vudasavise.pdfIn PDF document text
    • https://emotionalgift.com/ckfinder/userfiles/files/28072366067.pdfIn PDF document text
    • https://bmw-zona.ru/uploads/file/xagorejawuzu.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613b21c74037b---82094271831.pdfIn PDF document text
    • http://luberoff.com/userfiles/file/57391902256.pdfIn PDF document text
    • http://lnyuanzong.com/uploads/files/20210921080733.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/f222d19f299845a64bc66b5188f79461/luwogapamikigebojigeso.pdfIn PDF document text
    • http://spharma.ua/files/file/23240468639.pdfIn PDF document text
    • http://kystar.net/filespath/files/20210910142258.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614c253adea5c---judijupived.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/458a23722df823e16bde631305c874dd/tabosemotegaze.pdfIn PDF document text
    • http://terrietanaka.com/library/files/fidofokipofumu.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_off0000b115.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB115 16348 bytes
SHA-256: 09f9f10e7cd2e91cbaa0caa5409e172ddd31e678b3d5b6140ae25e4d6a303f69
font_01_sfnt_off0000db1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF335 10808 bytes
SHA-256: c03bdc44406376c4a2d0b61460c2dc02b1699aa939b9bb5861d0074f33784215