Malicious PDF — malware analysis report

Static analysis result for SHA-256 6970d4d4f6d51768…

MALICIOUS

PDF

121.8 KB Created: 2021-08-07 02:41:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: a7a9f00a7307224bf5ef069c8711152d SHA-1: 3f3c035b9031f51a25504d256d51a7a7390ebd2e SHA-256: 6970d4d4f6d51768f7591efdd79ec55985e0aa441d922cdd0315fad1f7be415e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users. ClamAV and ML classifiers identified this PDF as malicious, specifically flagging it as a phishing trojan. The presence of embedded URLs and the nature of the heuristics strongly suggest a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://ketchas.ru/uplcv?utm_term=fantastic+beasts+and+where+to+find+them+movie+trailer PDF link annotation
    • https://proxus.nl/file/ziwolow.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6cef0ad59---64955878119.pdfIn PDF document text
    • https://kaisar168.com/contents//files/74835883588.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160caa38cde484---53823775701.pdfIn PDF document text
    • https://khambenhxahoi115.com/images/files/sametimitiwuvalavimanefij.pdfIn PDF document text
    • http://3dprofi.net/images/uploads/file/momobagorus.pdfIn PDF document text
    • http://strandedtattoo.com/file/60892751420.pdfIn PDF document text
    • http://nprofit.hk/userfiles/71442283060.pdfIn PDF document text
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16099bb6b618e1---guvokewixuwajetek.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/ee061767bfc8b9cd8be4e6572f1396d4/vituxexeduzosaruloda.pdfIn PDF document text
    • http://yakutiaprime.ru/SITE/files/editor/file/diwediwurev.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/4465827697.pdfIn PDF document text
    • http://wpscrm.in/uploaded_files/userfiles/files/ropetivulifunaze.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/848eaf4cc528f86c4477846aac14369d/vepodarobifujexa.pdfIn PDF document text
    • http://kasargod.net/uploads/file/dinofadat.pdfIn PDF document text
    • http://snsi.jp/image/news_file/dogugef.pdfIn PDF document text
    • https://ecosolar-energy.com/piceditor/file/kupugepunomegegidojoxap.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607022237f59c---90949325538.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9281a09cef---28569970593.pdfIn PDF document text
    • http://oralrem.kz/ckfinder/userfiles/files/13271662045.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/koruvuje.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fbdebbae675---xisisubozomutegulejiferom.pdfIn PDF document text
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e8d4f6a1b95---70997310929.pdfIn PDF document text
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/f615e2ab1b33e90ee095533701637ba3/jovelijujudodinovid.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_off0001761d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1761D 18536 bytes
SHA-256: 1d2f0dbf8d1a93a644f7e642796ec904b0e570ce9abce42eade0f1d8fde88da1
font_01_sfnt_off0001a6fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A6FE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001bf15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BF15 11012 bytes
SHA-256: 00b2f6abb19591df93da95b01733485515390fc479fa92aa23578fc9c6b88070