Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd79a93c34820049…

MALICIOUS

PDF

73.3 KB Created: 2021-09-27 01:12:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 9f72798f8899f743019e8de9443ca69a SHA-1: ce9cd5d00ba05437fc3c61fa999b75e1460e7312 SHA-256: dd79a93c34820049e1c81711baaefad7fd426502275c3d509a8b09d7093896dd
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external URIs, many of which point to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure and embedded URLs are indicative of a multi-stage attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9837

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://chcial.ru/uplcv?utm_term=dynasty+iptv+firestick PDF link annotation
    • http://traktorpulling.de/ablage/userfiles/files/74342898028.pdfIn PDF document text
    • http://greenld.com/userfiles/78746174478.pdfIn PDF document text
    • http://xn----7sbabaajmdfbk3ddf3azka3b6a2r.xn--p1ai/ckfinder/userfiles/files/15926142333.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/b20dcb0b4eae1e6ed3db432489217fa9/wavofupimono.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/161409181b01ad---kelisipufokeneras.pdfIn PDF document text
    • http://byecook.com/ckupload/files/28196399630.pdfIn PDF document text
    • https://lmetinternationalschool.in/ckeditor/ckfinder/userfiles/files/44948591260.pdfIn PDF document text
    • https://www.serwkom.pl/plugins/ckfinder/userfiles/files/wozekuwebozokolunelafulo.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/81947462623.pdfPDF link annotation
    • http://kaie.org/userfiles/file/20210913035813.pdfIn PDF document text
    • http://kngsm.in/userfiles/file/naxut.pdfIn PDF document text
    • https://adikkedua.com/contents/files/radenatiwidupejowosi.pdfIn PDF document text
    • http://lawyermo.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/75784009276.pdfIn PDF document text
    • http://samwha.com/upload/userfiles/file/98073779474.pdfIn PDF document text
    • https://2b3la571ga-70p.com/contents/files/fakogevenobe.pdfIn PDF document text
    • https://glamweddingdesign.com/userfiles/file/36551846191.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/7b58d17df3814bbff9f4752653d1d45e/tutur.pdfIn PDF document text
    • http://congseng.com/uploadfile/files/54278098152.pdfIn PDF document text
    • https://ceylanotel.com/firma/files/bizagepetu.pdfIn PDF document text
    • https://szallas-karpatalja.com/upload/12273008632.pdfIn PDF document text
    • http://ingore.cn/upload/files/45198045038.pdfIn PDF document text
    • http://zhizhencn.com/filespath/files/20210916110818.pdfIn PDF document text
    • https://kaptenhoki.info/contents/files/69649667264.pdfIn PDF document text
    • https://kaimano.it/file/52841935900.pdfIn PDF document text
    • http://thomas-zigon.de/images/file/simodunebekozukimuwozeku.pdfIn PDF document text
    • http://inbond-cn.com/userfiles/file/lejemamasiliwef.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/rawesidokibefur.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_off0000b506.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB506 18812 bytes
SHA-256: c3a5d3d2555a2a8f18339f7f9125f5bfa57bd52d23d08577a78940f05e09ae3c
font_01_sfnt_off0000e57c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57C 10580 bytes
SHA-256: 6a250cfaa17243526edd08cc27a190e4624cefa49988e5263d3440f36a723f48
font_02_sfnt_off0000fde6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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