Malicious PDF — malware analysis report

Static analysis result for SHA-256 060f69b37762f5ab…

MALICIOUS

PDF

71.2 KB Created: 2021-08-10 09:46:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a280c8429acbdbfee026f1d00e5b0969 SHA-1: e920659d33afb0fdd9f5cb641921fe475a5b0a15 SHA-256: 060f69b37762f5ab4abed8f69defefac6e05cf8165fc952279b6df76577f0f41
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to redirect users to malicious content. The document body is heavily obfuscated and unreadable, suggesting it is not intended for human consumption but rather to host these malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/v11lvcasp4rm813p311pqjeg3k/tariveveromifa.pdf
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160871d849ad77---mebunakowiwufigiwekasesu.pdf
    • https://angelsstaff.com/uploads/file/61705187755.pdf
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160759267dc48e---86518980418.pdf
    • http://sinostandards.net/upload/files/gimodawuliwafibuserobu.pdf
    • http://www.rodnolespropertymanagement.com/siteuploads/editorimg/file/kekemokubewosogesaf.pdf
    • https://nmcs.ca/userfiles/files/xobuxonid.pdf
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/jaterivowepas.pdf
    • https://jagamimpi.info/contents//files/90918613515.pdf
    • http://akademia-jedenastka.pl/zdjecia/fck/file/xalod.pdf
    • https://adikkedua.com/contents//files/rudisusawufogupekoguw.pdf
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba08943defe---losifigafubuguwofa.pdf
    • http://baheth24cars.com/ckfinder/userfiles/files/jolotejuwazegemamawanek.pdf
    • http://delve-cr.com/uploads/28965648067.pdf
    • https://alatheir.com/atheirwsfiles/file/92591494913.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093c646a00fb---fuvodiwusefelit.pdf
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/14c858e615495d43896a9ed33204c5f4/36871403686.pdf
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16110fe5cceeda---tusag.pdf
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160718370ce259---70800230511.pdf
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/6e3d2eec1bd7b7eb2da6caba57525c65/pizudelipiwusagif.pdf
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/4b1f9a4fd1008e8391f472ae9cba99f6/zidojupikuwisixekabikedew.pdf
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160acd95292838---49053222822.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=elapsed+time+worksheets+pdf
    • 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_off0000b8a3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB8A3 16792 bytes
font_01_sfnt_off0000d0ba.bin
351e06cbf77bec1b1e18d1a89703571e4b9f31ece795e8edbcdb482611d56b57
pdf-font-stream PDF embedded font (sfnt) at offset 0xD0BA 10820 bytes
font_02_sfnt_off0000e9ba.bin
004aba719825370096a658a9ebdc650717773ff6f0bb451e2f7daebb0a82a0e0
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BA 14904 bytes