Malicious PDF — malware analysis report

Static analysis result for SHA-256 767f96ae23cd4426…

MALICIOUS

PDF

198.8 KB Created: 2021-09-08 10:27:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2380c4f927a88a08b70dcc3bd62b36e1 SHA-1: 14f090f7f20cbb7258c35b29ece412ec15647bbc SHA-256: 767f96ae23cd4426294810338321ad0fe8154a1498d24f49bed99c674d8bd8b7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs, many of which point to compromised WordPress upload directories, suggesting an attempt to host malicious content or redirect users. The presence of external URIs and the compromised CMS upload link farm indicate a likely phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9763

Heuristics 5

  • 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.
  • 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://archism.ru/uplcv?utm_term=john+maynard+keynes+kitaplar%C4%B1+pdf PDF link annotation
    • http://anthonyvienna.com/sites/default/files/file/38382521526.pdfIn PDF document text
    • http://coytex.net//ckfinder/userfiles/files/44745826222.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/95837552393.pdfIn PDF document text
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16075823946e49---newunawiligizutubup.pdfIn PDF document text
    • https://cremyco.com/app/webroot/docs/file/7975579116.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076da416cc07---garuweja.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/t2qe2e8flis5gj9loel7p4af1t/60421570886.pdfIn PDF document text
    • http://coffee33.ru/archive/file/75986459580.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/fegezifujefipezeg.pdfIn PDF document text
    • http://dunajecbiala.pl/upload/File/58870459161.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3d2f78839c---75642441585.pdfIn PDF document text
    • http://weiken-rc.com/upload/files/48296500241.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/rvu8s96f69n8d4rivm915a1206/22999418191.pdfIn PDF document text
    • http://fleshlight-tw.com/userfiles/file/32693870974.pdfIn PDF document text
    • http://studiosiriosrl.it/userfiles/files/34627776436.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/68812874432.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1610e8e7082f1c---vagewagez.pdfIn PDF document text
    • http://eszixv.hu/ckfinder/userfiles/files/xugebok.pdfIn PDF document text
    • http://alacartedesign.de/userfiles/file/71957742865.pdfIn PDF document text
    • https://dewalt-naradi.cz/media/upload/editor/file/34222198649.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160987a3b08a92---lakoxomitonekodoxiro.pdfIn PDF document text
    • https://cicadit.ro/UserFiles/file/bikax.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c85525ec41c---7835001180.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002a781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A781 11008 bytes
SHA-256: e0c9e7fd37acb4994a32dac997ad08968b840abbbdcbc288369e2b1895f0c1ab
font_01_sfnt_off0002c0d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C0D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002d8e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D8E9 19500 bytes
SHA-256: b2bffa9f96ccb1949b3838899b44b266ba26dd8a5b06cac20e254d2df6cd98a4