Malicious PDF — malware analysis report

Static analysis result for SHA-256 fec8bbf0ec8c49ce…

MALICIOUS

PDF

87.0 KB Created: 2021-06-29 22:47:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 84ed1532f1a966f2406756a6958561cf SHA-1: f2fa1dac70b868fe1e3161bf09c1c10dc402a4f8 SHA-256: fec8bbf0ec8c49ce166550c7eb4ecdee6ebaa67d34e548ec7604a8dfcc94e9c4
184 Risk Score

Malware Insights

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

The file is a PDF that contains numerous links to compromised websites, many of which host other PDF files. The presence of a 'download button' heuristic and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggest a phishing or malware distribution attempt. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://fuchscars.com/wp-content/plugins/super-forms/uploads/php/files/b9cd166445e68de9f0ef9d528d8dd6c0/dasenogefimivapi.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160995daf39881---jazasalaz.pdf
    • https://angel-juicer.com/FileData/ckfinder/files/20210621_F811C3E05904374A.pdf
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6d225ea19---dolimiwota.pdf
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/l5qg9v7bed86g9623ajh83rsbv/fisinup.pdf
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/7d5ff6fc23bfc900371caaea8de676b6/33526481546.pdf
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/779ba164e4f1bad062362fefe025df92/jojipotupizu.pdf
    • http://dmscsmartlifeblog.com/userfiles/files/zipata.pdf
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077d98f6017c---62901945313.pdf
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1608f6840630db---18367893656.pdf
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/dsqsmppok12k6r6q2iojfljc75/tifademupebibudibux.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607741bc17c72---59625831975.pdf
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160906b9649894---6867034708.pdf
    • http://sure2trips.com/bot/ckfinder/uf/files/jiduranatamene.pdf
    • http://aarogyamedico.com/userfiles/file/zikuvotilagoke.pdf
    • http://komputerzagrosze.pl/userfiles/file/20421746194.pdf
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/b985aa3990371fc7bbcd4dd0d3fb2e70/65585443235.pdf
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/669985494234ccf91c522d7bbbe391d8/53401520808.pdf
    • http://s8radziejowice-paszkow.pl/userfiles/file/23429796188.pdf
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/wewugopi.pdf
    • http://www.asap-recruitment.net/upload/file/wunasom.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a5169b12d---33306750898.pdf
    • http://microcement.ua/userfiles/file/judiximulipiriwibi.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=firebreather+full+movie+download
    • 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_off0000f1e4.bin
e38081e4a5a2d3524813d9ee211ee83d2bbcd021cc70b0367a7ad4e52d1efdbb
pdf-font-stream PDF embedded font (sfnt) at offset 0xF1E4 16920 bytes
font_01_sfnt_off00011dec.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11DEC 16792 bytes
font_02_sfnt_off00013603.bin
30a7a15787765d6fd49798b628834b4cfb0fd75026810f212dded8ba0118bd66
pdf-font-stream PDF embedded font (sfnt) at offset 0x13603 10820 bytes