Malicious PDF — malware analysis report

Static analysis result for SHA-256 0431b1ab765056d2…

MALICIOUS

PDF

77.6 KB Created: 2021-06-29 16:46:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 473ede262c9797b8bbd107b163b239b1 SHA-1: cf3b479d274ab7406b347ff9e754383bf0ba1737 SHA-256: 0431b1ab765056d2ff107e56b77acc814b248c9634fd7442bccae7be02b9861e
154 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, indicating it is likely a phishing or trojan delivery mechanism. The file contains numerous links, many pointing to compromised WordPress upload directories, suggesting it functions as a link farm to distribute further malicious content. The presence of external URIs and link farms on disposable or compromised hosting reinforces its role in a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5478

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.
  • 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
  • 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://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/14b201d7497aa11e060dc4f22c91e8dd/vekanobosa.pdf In PDF document text
    • http://aggengr.com/uploads/CMS/file/nomadibixesupikeges.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ebdc289416---zefigujumuluxufuj.pdfIn PDF document text
    • http://gloria-eurex.com/20164790143.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/vfja5u3ndv6m558eo0a1758agf/46356329546.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/63441f0714a8ce3f5c41396bb0d39de8/9900266788.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/bf8acc2c079458b3797038d59786180b/tusegorona.pdfIn PDF document text
    • https://drsubhashawale.com/ckfinder/userfiles/files/87623240571.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fbe63ec852---wemowonaxowalefatekaxeta.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/98e6de5b0d3945dcc7063fa65b3ec0a0/79956554311.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16089bba37d6fa---xenaguvitemomokawama.pdfIn PDF document text
    • https://www.tangelo.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609a952340591---189676165.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/b041b35978184cf56f2c6843689a6b92/gejurakun.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/88ecc7e8334042cb51689a1fe5ae29b5/17349849017.pdfIn PDF document text
    • http://www.ortodonciaelisafarache.com/ckfinder/userfiles/files/rodaxe.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160752b4382fc9---kuzegizafadureva.pdfIn PDF document text
    • http://medica-brno.com/files/lujaforaliw.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/56690703175.pdfIn PDF document text
    • http://bbfrontedelmare.com/userfiles/files/womigasudemidafa.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9cb35a2dc---kukikumi.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a49ce9f127e---900488640.pdfIn PDF document text
    • http://technestudio.eu/userfiles/files/88597050765.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/73289b20141df81588d03209c244def2/pagevesezaguviruwe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=the+avengers+age+of+ultron+watch+onlinePDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000108f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F8 17436 bytes
SHA-256: c618ef4eb40055255f7041997ff9c9dc6cafcc45cb8c94ce0b807c9ad8b1f4d7