Malicious PDF — malware analysis report

Static analysis result for SHA-256 afc06b6043ab2488…

MALICIOUS

PDF

182.5 KB Created: 2021-07-08 02:54:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 13f24c1c1905376f570d93dc7d5b66b2 SHA-1: 711f980eba69c758259cbc246196765bf4442f09 SHA-256: afc06b6043ab2488d5d851e9239b000ac56a6ba6ebdadb69caa88a639ea68bd7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs that point to compromised CMS uploads and disposable hosting, likely to distribute malware or phish for credentials. The primary lure appears to be a free ebook download, which is a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9740

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://synerhu.ru/uplcv?utm_term=48+laws+of+power+ebook+free+download
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160816b3188256---70419845408.pdf
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa2a820770---fosurugizenom.pdf
    • https://anakmeong.com/contents//files/fiwejewok.pdf
    • http://ilovegabal.net/fckeditor/_upload/file/74354484840.pdf
    • https://eminencesolutions.in/resources/userfiles/file/zijotosaze.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/6b5f3c43b6d145c240357629b47f8448/zilawozir.pdf
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c11ea2bdbf---80543329751.pdf
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/df81e9a90ac11378af7bfdb4949c5183/48298306725.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/4dc0d50dbc1292a8a41f51147c2d86b6/lufemuwilabajatufex.pdf
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/99dd2a1a4ae2a3dec67cca5a6dcb94d2/56917894437.pdf
    • https://soechi.net/userfiles/file/17354499026.pdf
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/4cdd5194f537fc07dc7bd3615e695b24/9300269497.pdf
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872cf886ed5---rotidijonewexexo.pdf
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/q9m8kr39ars68gobkl0o5umi75/nelimolupeginomimakaxovi.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d3b3d9814c.pdf
    • https://kodcomputers.ro/2664/uploads/9955564889.pdf
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/160807a18a03f9---ganelototak.pdf
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160797c3847698---miwulelatatorososilidubuj.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088e909b636a---tidowagomele.pdf
    • https://holocaustresearch.pl/nowy/photo/file/dexisibebimeb.pdf
    • http://domgr11.ru/uploads/files/50058960220.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16083a34cd0b77---67887088541.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160701cfb0ce8d---nogiliki.pdf
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/gmo2eih0hs96mb5vqn9mn48d9k/50956622089.pdf
    • http://bike-aholic.com/UserFiles/file/felepe.pdf
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/a7890b688e3204e69851a68c344abee7/gitagadalukuledasuzoweza.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_off000268e2.bin
a22b925d7113900b4427c1d49e03359b177b39e1c43276022985ef912616158e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x268E2 10808 bytes
font_01_sfnt_off000281c6.bin
9e44c8945f7836fcf597e3bcdb936c23c9b23076c4ac6c71e4dd87b5ad4b1a99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x281C6 19160 bytes
font_02_sfnt_off0002b27e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B27E 16792 bytes

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