Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dcdaf5298a78005…

MALICIOUS

PDF

94.7 KB Created: 2021-07-28 13:49:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 590283810cadd74ef6fa69dcadb1bc0e SHA-1: c7893cc6ce7a82574a7f41c7273d1324c5c1ec3d SHA-256: 7dcdaf5298a7800553a9198b1e57b09b7967c39f3687d21dea91dde228b85c80
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple PDF files hosted on compromised WordPress sites and disposable domains. The presence of these links suggests an attempt to lure users into downloading further malicious content or visiting phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 7

  • 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.
  • 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://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2bcb2238b0---sejadevaj.pdf PDF link annotation
    • https://ideylia.fr/uploads/file/35597015600.pdfIn PDF document text
    • https://siam-royal-view.ru/data/files/86371020846.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/bqihkk7ibvlm9hqjnim4jnjfi4/66168547401.pdfIn PDF document text
    • http://tchsgradnite.com/clients/5/57/571263abd544e5253d6fa656c7d1828a/File/22032446541.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/4f77lnqnoouis29l0qn1d5902r/geletinesadevixaf.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ae86c370f08---velawinevaz.pdfIn PDF document text
    • http://28777886.com/Lpf/UPFILE/userfiles/files/45887474380.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bead1651912---sosutiresevubi.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ad5a2d0ec---84179851392.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da93aa76631---nogugotusobigonebusewejop.pdfIn PDF document text
    • https://koratspring.com/upload/file/dovezutadu.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/b27c20ef14a90ffaaa0ab0d03f558f27/tikovadumirijugod.pdfIn PDF document text
    • https://castilloexterior.net/ckfinder/userfiles/files/dolimekinojabev.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c19588dacb1---79895229643.pdfIn PDF document text
    • http://klpa.net/userData/board/file/fazusi.pdfIn PDF document text
    • https://medicula.pl/web/uploads/files/93068929405.pdfIn PDF document text
    • http://vet-arrighicolangelicristilli.eu/userfiles/files/jafuw.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e687e58ad---4248651301.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/gizif.pdfIn PDF document text
    • https://anctools.com/ckfinder/userfiles/files/benezumikabideriwunedotex.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/18ba9e35e48057556b7cd07464eb1775/35443989745.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=la+casa+de+papel+tabletPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/1eb660cc86283e7963b4ef70d2b4686d/jukoge.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE860 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10077 10188 bytes
SHA-256: 1d3f8d500ba7ac3f846d634578fa6f71bb80c5f6bb3a08855171711dadbd3f21
font_02_sfnt_off00011731.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11731 21220 bytes
SHA-256: 364f3f1d507aadffa178b2b42d77e45f1d9ec665e44c08f2a53de7e7727b9741
font_03_sfnt_off00014c59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C59 16164 bytes
SHA-256: fd494554c7a7a2c4488382a78096c535ff133766c7221992be4f6a58596b2467
font_04_sfnt_off000161c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161C6 1720 bytes
SHA-256: 9c3c50ca7885eb1b87261f6f74ba185aca171ae216209544253fbc3ee3acc073