Malicious PDF — malware analysis report

Static analysis result for SHA-256 180c876d6309d5d8…

MALICIOUS

PDF

76.8 KB Created: 2021-06-25 18:26:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 910269df86adf9a4915e7cb241a08f0a SHA-1: dc95e0a1f34d794d50cdbb019db73264cddc065a SHA-256: 180c876d6309d5d81c2cef0963e59f9d33cbf59604b164eaac32a4c1821b0e66
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The document body is heavily obfuscated, preventing analysis of its specific content, but the presence of multiple external links and the 'link farm' heuristic strongly indicate an attempt to redirect users to malicious or phishing websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608772ce19406---morefojifinawiguvubuzixok.pdf
    • http://palami.by/images/file/baferuzijusezeji.pdf
    • http://www.rlktechniek.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608303f5635ca---95878452682.pdf
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/b887a68b3185fc483265c017beee70d7/lezuzi.pdf
    • http://csaladiegyteruautok.hu/userfiles/files/xuvifiputakunuzadazovisuf.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160afee69a16e5---lizipogeteguxapizuruz.pdf
    • http://chretkinia.pl/userfiles/file/60925180590.pdf
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160731aab3ed84---44469751779.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aeb338b6f9f---69114180195.pdf
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ab237eea5---9331903807.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160ce0f377f689---xalobite.pdf
    • http://dagmare.de/userfiles/file/luwuvurakino.pdf
    • http://4reality.cz/userfiles/files/41940822275.pdf
    • http://andrewsexes.org/clients/867461/File/63299400549.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/nc30o0o0ls51dg86p4pep3kvo7/jopaseruwabemomebafovo.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/9ecdd1e7283ec59fd3a05677bc3ef0bf/famusofawowul.pdf
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607797c4441aa---losinogafasaxowataradum.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9ce2cd114d---womovij.pdf
    • http://allnatureint.com/userfiles/file/60328531091.pdf
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d017c2485d---bituperubodavat.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c9f3c27be43---80714461602.pdf
    • https://syteq-pro.com/userfiles/file/77572844397.pdf
    • http://ztkammer.at/uploads/file/muwomoniwexosofefumo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=common+eating+disorder+symptoms
    • 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_off0000cb57.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB57 16792 bytes
font_01_sfnt_off0000e369.bin
cfa3f952e02deb598036802e57df376c75fa2479caf551fd0b373f08a0e61729
pdf-font-stream PDF embedded font (sfnt) at offset 0xE369 16196 bytes
font_02_sfnt_off00010d1e.bin
fdd8456092f687fa72e19e3d897cfc0ae60d00cf51461e7449636576d6a56796
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1E 10836 bytes