Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccc6ec38b3fd1f95…

MALICIOUS

PDF

81.1 KB Created: 2021-09-22 21:56:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6ec566cc8348648c4e6844858966f818 SHA-1: 110f05348b1c875057bbdbc15a9dcf81aa1aa326 SHA-256: ccc6ec38b3fd1f95b36bc2429b48ecca244d83ef618576f1671a97ea16b18ca7
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, indicating a phishing or trojan payload. It contains numerous links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly indicate an attempt to lure users to external, potentially harmful, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://frontiermyanmar.com/sites/all/libraries/ckfinder/userfiles/files/7425436574.pdf In PDF document text
    • http://offerseir.com/basefile/offerseircom/files/nolisovefetipowiv.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/xazalogojofewevejo.pdfIn PDF document text
    • http://syntrend.critical.tw/upload/files/66594198290.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/895h69ujuj6hqi3bb8a16ehr7m/67355793090.pdfIn PDF document text
    • http://nhatrangpalacehotel.com/app/webroot/upload/files/80192857716.pdfIn PDF document text
    • https://doan295doson.vn/namthuan/images/news/files/1341303425.pdfIn PDF document text
    • http://kuwaited.com/cote_dor_import/admin/ckfinder/userfiles/files/85679497985.pdfIn PDF document text
    • http://xn--54-dlcdkamdj4btild5b.xn--p1ai/ckfinder/userfiles/files/sekafufimedesowugiva.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/64697574341.pdfIn PDF document text
    • http://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/70399871908.pdfIn PDF document text
    • https://commonlawhouse.in/userfiles/file/xadewobagisezewokodifaz.pdfIn PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/befesewiwedofegutav.pdfIn PDF document text
    • http://www.golfusa.be/userfiles/files/36348158274.pdfIn PDF document text
    • https://shiokuda2.com/contents/files/20700912782.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137f9572fb2a---kimewefitotunotigomotupa.pdfIn PDF document text
    • http://conhantaoankhanh.com/webroot/img/files/fileber.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/161470d68d4cf8---19596178382.pdfIn PDF document text
    • https://cafesca.info/ckfinder/userfiles/files/putudel.pdfIn PDF document text
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/36620609867.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/egfp6dpd9vukjarkdokn4t8jnb/falilezujusukojik.pdfIn PDF document text
    • http://nagymester.com/userfiles/file/piwatulorevivawax.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/cjr3n42te59u8ela686cv1l8ct/46592735769.pdfIn PDF document text
    • http://gzperson.com/uploadfile/files/51890324453.pdfIn PDF document text
    • http://gimnazjum-krasiczyn.pl/img/userfiles/file/32085407255.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/4c3ef6b0dc4e733ae4a4435ebb9cdfe5/61425684271.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=motorola+no+command+recovery+modePDF link annotation
    • 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_off0000d971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD971 17256 bytes
SHA-256: dbdf4a70bbc0da48e7b3b494e15cb6f3de9a8f76f3ab768f4f3934105e2b5f87
font_01_sfnt_off000106fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011f14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F14 10444 bytes
SHA-256: 2f1514bb93ecb867b8217caf14bbef77c77600dc1218e7082530a3e75c16eb9b