Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb1b192360e27e63…

MALICIOUS

PDF

88.6 KB Created: 2021-06-27 00:13:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 22bb8a95fded51eaa97862c92cd05b87 SHA-1: 0efde8dcb2ff32adadc5e5cd4dc9ac903175721e SHA-256: eb1b192360e27e63852dbbc9b0cd7f1b806b747ac396c12efaf0edc78bf41d36
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs pointing to various websites, many of which appear to be compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and unreadable, suggesting it's not intended for direct user interaction but rather to host links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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=red+rose+beauty+parlour
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16098ac50325f8---mosajigovubopinawobor.pdf
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/4ld3dl7kbfl4o1o8fh65692gnq/mikesemeges.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a639a60d6a5---32533215359.pdf
    • http://www.aportecnica.com/imagenes/editor/file/sonaxizurimubuwabezaralas.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160759d2ae7363---ratoxizipuforezosevo.pdf
    • http://centralwestwoodclassof1983.com/clients/c/cd/cd4b3c89dd1500142a52f05b9125c350/File/moxugitujatas.pdf
    • https://atpl.aero/ckfinder/userfiles/files/logiwilobezo.pdf
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083cd20a7480---jetiritefeveginanapafeje.pdf
    • http://abwalabamaave.com/uploads/files/9983658646.pdf
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/f49a9fe60874f85430078f93420b9ea3/fanuviwuvod.pdf
    • https://iva-vietnam.com/userfiles/file/61430636237.pdf
    • https://steammining.com/userfiles/file/88473500396.pdf
    • http://twfindia.in/userfiles/files/66908550909.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/s1hjuldb42bem2jjh5vrlp5rl7/40123138742.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7facc0b38---66840750954.pdf
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a8471d4019f---gumuxiporoduwogimolokez.pdf
    • http://kartywspomnien.pl/uploads/assets/file/lebigugawi.pdf
    • http://amsasecretariat.fr/userfiles/file/tojud.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/cmll7udg372dped1qk35i3v4ud/36077796407.pdf
    • http://fundraisingwebsites.com/clients/9/96/963d931f30a9d2280975e71a7f923c96/File/patov.pdf
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/c1cffe107a27a54b3ca0fe19fea8ffb5/webatimomawamijijefu.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0cef16d83a---5093724733.pdf
    • http://skyfestival.kr/ckfinder/userfiles/files/69040860828.pdf
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/5750bbd382b1fac79530817701340e6b/nawariwakekoluxaki.pdf
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085d3188ff63---pevewosolivavipivasit.pdf
    • http://leilehua76.com/clients/4/4d/4d80c013f15dbe3c797666a457780dca/File/74519627643.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f584.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF584 16792 bytes
font_01_sfnt_off00010d9b.bin
5cd7e2d2f3a1e308b6670d351bbd0f05f7160f295d3a5d9859e82c5cf0324b60		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9B 10588 bytes
font_02_sfnt_off000125c3.bin
131aa1c751e461ed52d3a6c92d53ffa5e78f3c0a8617be257fe460a8b92077e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x125C3 17540 bytes

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