Malicious PDF — malware analysis report

Static analysis result for SHA-256 57393346f1630dd0…

MALICIOUS

PDF

87.4 KB Created: 2021-06-29 21:19:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f9fea14e38bd74937e301706fa7bad05 SHA-1: 3f23915f4514b17eb0f84e816e962f23760a9806 SHA-256: 57393346f1630dd027113905d0f3699592afee1940a853c02e2903f98c95a54d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or trojan delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

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://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/k3sol1otcb9lf3ivhsu519uon6/rodesolusipibituno.pdf
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c0dd0aec361---wifanudofasanab.pdf
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/e75e86e3adc8b4551a107ef5b921f016/xurawezunutimib.pdf
    • http://fxmeat.com/upload/file/52fb54bd380ffa92cf1889c70281140e.pdf
    • http://burrburroughsfamily.com/clients/55468/File/tafasanezeleduvo.pdf
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2de1aebcb---xutabosiv.pdf
    • http://tragiaocolamsapa.com/userfiles/image/file/remukukatevesol.pdf
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c70ba56702---99172794525.pdf
    • https://bkht.vn/userfiles/file/dedugepuvobepa.pdf
    • http://arunimaflavours.com/userfiles/file/53830858543.pdf
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b03cee9d0---wilafifafalokeba.pdf
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d263cc1fe81---gapatovepobaxes.pdf
    • https://dynasty888.com/image/files/20210613_025249.pdf
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b478ace12ca---37640382959.pdf
    • http://szao-spb.ru/images/news/file/65893305784.pdf
    • http://tuzvedo.hu/elemek/file/gazinafoteraluwapid.pdf
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/jrkv74vmninongigji2p0r9h96/47857147022.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609f43c0d6ba4---raroxe.pdf
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/qo3vjik00dnj0tnkn2sh4eglh3/86861900186.pdf
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e9389d45e9---27574026310.pdf
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/9d1233d90f54605cfd4cc4fb71c30a84/depikuxasivuremapigigena.pdf
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089242cbb321---42218847639.pdf
    • https://sindonis.com/userfiles/file/64409308029.pdf
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/11d8f944c3cd5f790bf063ebb446119f/sifopam.pdf
    • http://mjsolankifoundation.com/fck/imagesfile/41799584453.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=list+of+professional+courses+after+graduation+in+science
    • 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_off0000f1fd.bin
786fe0090f2daf9ba9ebad3d31ef0dbfd55a97a0d268261675c0a5ee8143588a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1FD 17080 bytes
font_01_sfnt_off00011ea0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA0 16792 bytes
font_02_sfnt_off000136b7.bin
d41c59bcf44c60633c22e4c59bb8e289fa364c185a18a29a63254f5b31ed8281
pdf-font-stream PDF embedded font (sfnt) at offset 0x136B7 10852 bytes