Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ba0b2f0b1b2a8fb…

MALICIOUS

PDF

87.7 KB Created: 2021-07-15 21:01:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 444b8e1ed9fe48237a63624c342756d6 SHA-1: c141ef942117a9d762fe1a0a1b2e38ed58d47829 SHA-256: 5ba0b2f0b1b2a8fb73d188fc701c4245c1d16d1397c5a0867b30171cb8feeb5c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links, many pointing to compromised WordPress sites, indicating it functions as a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ba089d81cb7---bamumosekomanedet.pdf
    • https://pensiunea-escape.ro/ckfinder/userfiles/files/tiraruvuzosuleru.pdf
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/q0bqec530gd129n11e1dmnbjv6/13412138496.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7bb03da49---25481981736.pdf
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/ac1197e03fe3206267bea1a8c5007486/13158515057.pdf
    • https://nhanloc.net/userfiles/file/36708031148.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160ba31a62ba5f---ponuvajijovu.pdf
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/049ffd6c2493b5e6c9ad90ca23325945/bojogezipom.pdf
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/tgd5tr1887b4l0vrg9th9auhe0/penetamibijubolupilipog.pdf
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/5ac649213768315d6680712045abd407/68753789142.pdf
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9dbc7d380---52673060951.pdf
    • http://doktor-okonski.pl/uploadimg/file/92639442192.pdf
    • http://carrozzeriabosini.net/userfiles/files/xuwiw.pdf
    • https://invest.pl/userfiles/file/xebuxi.pdf
    • http://ninfahartman.com/clients/d/d5/d5ac6782717b6a1c58177985440d8e57/File/duxumeragujipavotibigubas.pdf
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/9c77f019ce2c81626ed0c837702c5a5a/51984909483.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/8e1dbf708b3528b6265c9a8b35c69df9/xefekugopidesexefupitog.pdf
    • http://ned.ru/uploads/files/55761619491.pdf
    • http://ideas4mypool.com/userfiles/file/37609937286.pdf
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/934646c5775694859a66fa209fab8838/35208940676.pdf
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4c3768562c---1155029.pdf
    • http://foto-klub.dk/userfiles/file/84166669216.pdf
    • http://www.colormotion.cz/UserFiles/file/20760102459.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=baptise+in+the+name+of+jesus
    • 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_off0000f1ed.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1ED 16792 bytes
font_01_sfnt_off000109ff.bin
c53c58e0552927cb8e8632dcf44662e8efc9993acb4305c330823add2c6eb930
pdf-font-stream PDF embedded font (sfnt) at offset 0x109FF 18248 bytes
font_02_sfnt_off00013942.bin
3e5ed30fdd26f8bf5018a5949cd1a3e14caf8573654bec986960186faeea1667
pdf-font-stream PDF embedded font (sfnt) at offset 0x13942 10760 bytes