Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbcf10ac87a27f0d…

MALICIOUS

PDF

105.4 KB Created: 2021-07-14 07:10:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 76e2874f999da9052cc6d769da80479c SHA-1: 0838012129610e6db38c4fe599769a64832cac14 SHA-256: fbcf10ac87a27f0d48150fdbb358b871e65995694bf0f8b3b6773092a7d66109
124 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan. Static analysis revealed it functions as a link farm, with numerous embedded URLs pointing to various domains, some of which appear to be compromised CMS uploads or hosted on disposable infrastructure. The presence of multiple links to potentially malicious or untrustworthy sites strongly suggests an intent to lure users to phishing pages or download further malware.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3329

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://jetaime-shop.com/files/zawajuzufetivajo.pdf In PDF document text
    • http://esejsc.com/upload/files/23098198882.pdfIn PDF document text
    • http://vimar.ua/userfiles/files/7679313819.pdfIn PDF document text
    • https://majorsagilekvaros.hu/uploads/file/gulutelasaxovolu.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/68usv9169bji4mb8tlltq1dck7/47186868242.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160cca33249020---90663102210.pdfIn PDF document text
    • https://wita.lt/images/files/xuliwavufake.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16086edef177e4---kovovuripavurafelo.pdfIn PDF document text
    • http://hebammenglueck.de/ckfinder/userfiles/files/mapevuvigeganu.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608efde559a68---zorudodujaburod.pdfIn PDF document text
    • http://refta-bg.com/userfiles/file/58610928287.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b7b146324e1---lakedamudejurufokogakexo.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/sobexewa.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16075daf85c70e---39275049683.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a912b67edd1---79260702689.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc94d88df7---wogokunazixulabagefofofo.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/90416016395.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/ad8da46f98558f781ab226768edb7841/49185486945.pdfIn PDF document text
    • https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/t5dp921hmfclurn2l3o6hsbci7/99947935142.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/n3ed7fj3ojv6gaatnf91dg1990/mofivupidegojo.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa4df02cce---43528573680.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/aebe423b5d721b7d0454fd50a8362712/rofif.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/9a36b51d9a7913dd5fd996c31db1fca6/wunuzigezulefujediriku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=stata+16+for+mac+free+downloadPDF 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_off00015116.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15116 16912 bytes
SHA-256: b6c7213960f54ead60f9b1bd1fd6482a71210f1d96971f15d8ef78e75e294e2d
font_01_sfnt_off000169b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169B9 10756 bytes
SHA-256: 58bdd4d30d9cf92815663735edff7e4b0f3d762b4df9266998012d06c422f30c