Malicious PDF — malware analysis report

Static analysis result for SHA-256 118386333e3848af…

MALICIOUS

PDF

100.7 KB Created: 2021-09-07 04:52:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: abfbe89a2260ae021408e366b2d5d8d0 SHA-1: e02c8f823c2818070bdce9007b4e9a7cc49dde1f SHA-256: 118386333e3848afe865ee7dba09f7b1abe3eb8b6168b92748881c0d78625e71
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and links to compromised CMS upload storage, indicating it's designed to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a link farm used for initial compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://philabc.ru/uplcv?utm_term=greatest+showman+band+pdf PDF link annotation
    • https://whatproperty.ng/ckfinder/userfiles/files/53723991717.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099e27b8cec2---88433387818.pdfIn PDF document text
    • http://studionegrelli.it/userfiles/files/molik.pdfIn PDF document text
    • http://kunas.lt/app/webroot/uploads/files/97953000556.pdfIn PDF document text
    • https://at-studio.tw/app/webroot/userfiles/files/20210722_124421.pdfIn PDF document text
    • http://uni-farm.pl/ckfinder/userfiles/files/35033088039.pdfIn PDF document text
    • http://dambi.pl/userfiles/file/rogudobebozasepinok.pdfIn PDF document text
    • http://flagrant-desir.com/userfiles/file/kudunulomelosogowipekiwo.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/65e246de6efdc8b40f38f771713283f4/vazatikiwu.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/zesijifujixigelidirenuxoj.pdfIn PDF document text
    • http://xn--80aaa1acmiejxr6d7fg.xn--p1ai/data/files/silumagajarafulena.pdfIn PDF document text
    • http://bulgankhangai.mn/userfiles/files/gepagozowe.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-5-28/20210528021644318919.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/durhj9vg8tp4to7g03t3ledao3/pinoviwudebalax.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160fe2b307e067---lituwejaxaxizeripo.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc13c237901---75316896333.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/sujivezirekuz.pdfIn PDF document text
    • https://kompaspt2.com/contents//files/63501956834.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210816_38C707105D52F272.pdfIn PDF document text
    • http://ooexperience.be/assets/Image/files/pewobabe.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c6d3f4df53---zufavuja.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b28f48b8e91---76622211337.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609a675dbf333---nabopujoturibenobovos.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000123c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123C4 18688 bytes
SHA-256: c968e68d76ac79446a1534fbe1b7351019a2b73e339a08b288b64534165517f8
font_01_sfnt_off0001542c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1542C 10888 bytes
SHA-256: f09467324926adc6793f29c2a2e96279723e0de2db1d1069da5bd58a86808e22
font_02_sfnt_off00016d0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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