Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e06c171d8b5140a…

MALICIOUS

PDF

88.3 KB Created: 2021-07-06 08:19:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 1177470620ad44dbfc1411c7eaf5a002 SHA-1: ff4f51dce6dfdbe4cee4c8a7e53aec0e839c3893 SHA-256: 7e06c171d8b5140af99f7cce7ef61be254a615cffd699d436f543cfafe5416b0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://inwebjor.ru/uplcv?utm_term=the+main+causes+of+deforestation PDF link annotation
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1607eeb93a7def---tepidowipepopepelexev.pdfIn PDF document text
    • http://ecovn.vn/uploads/news_file/79042737361.pdfIn PDF document text
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/xetekijexiduxupigukaxu.pdfIn PDF document text
    • https://ovalpolycoats.com/media/33541976853.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f2b98dc4e4---79297235911.pdfIn PDF document text
    • http://vitalenzyme.com/uploads/fckupload/file/noduvapejix.pdfIn PDF document text
    • http://legendtec-eg.com/wp-content/plugins/super-forms/uploads/php/files/4jroj59e5r0ideg4aedr1rvga1/ninururawo.pdfIn PDF document text
    • https://chpcentre.com/files/file/6717597292.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac35bb47bf2---pasasoj.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/17389100897.pdfIn PDF document text
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/6n8tb114lnph432tohllqntro4/68959898080.pdfIn PDF document text
    • http://brno-skoleniridicu.cz/ckfinder/userfiles/files/belogikavazakowerozokupib.pdfIn PDF document text
    • http://wanyuantemple.tw/userfiles/file/81594261470.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/juvefededinevu.pdfIn PDF document text
    • https://martabaktelor.com/contents//files/80820015542.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db9d750bc11---kutuxeludu.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160befcc014127---rofejogelowu.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/619ded62d436b6beafb2c61745c3133f/61132963978.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/60trdtkv5rmot2ou42fgp1ffgo/87842125336.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/rukuw.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/65754799110.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/16093a26ba7122---demefaja.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bedb6fd1b68---sumemidufumozolinezos.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609256116a81d---zijisukowibotezesozevukix.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/456332472bad20d15c750d6435236a57/pakosemuzuraxigodu.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_off0000f364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF364 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B76 18092 bytes
SHA-256: 5c13502b9cbf0b6081f0414f6ddb761c2b3b7e4ba18d0e920ee4ef0ec2ee6c78
font_02_sfnt_off00013b64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B64 10756 bytes
SHA-256: 025db92eb3e9b6bcba4a5769c9587ee27c7bb95d48d822b27776789fd9f9e23a

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