Malicious PDF — malware analysis report

Static analysis result for SHA-256 b20cc52646cb0ebc…

MALICIOUS

PDF

62.3 KB Created: 2021-09-04 03:50:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: f11d6adf6f14d77f71bb3fc4139eeb67 SHA-1: 04d6e1d2b8fcfe06750a4ab0fffd119d498a7009 SHA-256: b20cc52646cb0ebc25ff835c6060be40ea65560e7fb19c3d0ca07762391cdfd2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of external URIs and link farms indicates a likely phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8194

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://garglob.ru/uplcv?utm_term=terapi+akne+vulgaris+pdf PDF link annotation
    • http://vinhomeshaiphong.net/app/webroot/img/files/kefazasapavad.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160709533eb917---nubivogutuzonezobopu.pdfIn PDF document text
    • http://hataylezzeti.com/resimler/files/paxaguzuxilosutobebexu.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae6207d7b25---kesapozetuxedebokiwaxor.pdfIn PDF document text
    • https://chilegastronomia.cl/uploads/userfiles/files/79258970427.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/84a698f8e801bd65187894d5df9b860d/juzuterafo.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8f15c062c9---3062698946.pdfIn PDF document text
    • https://carcarnet.com/home/sandbox/domains/hkdance.tritek.hk/public_html/ckfinder/userfiles/files/44894188017.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8fe67ec8f---32170062622.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084eb1f1859a---16078694677.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/deeeff5a01fd1524024e19d9b3adb523/3100134622.pdfIn PDF document text
    • http://alnadaoil.com/userfiles/file/xetumilivomivapomaw.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1610bc412ddc85---60211523993.pdfIn PDF document text
    • http://uniquehotelsolutions.com/files/others/92892290829.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/ljo8b26g5qt09n5qcb0feet8ic/vuboruzifujopokifozisan.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611e7823b5329---43668350163.pdfIn PDF document text
    • https://ienter.bg/files/52444940131.pdfIn PDF document text
    • http://lnyuanzong.com/uploads/files/20210901051426.pdfIn PDF document text
    • http://mynigaoe.com/upload/file/20210527223709.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/g18rpsgb1ufearccvirhd1968p/43156286588.pdfIn PDF document text
    • https://haysalon.com/public_html/userfiles/file/bufugirodamakuzodixafav.pdfIn PDF document text
    • https://bibliotheque-des-arts.ch/ckfinder/userfiles/files/79790194869.pdfIn PDF document text
    • https://speedwayinfo.hu/uploads/file/reverizebuxabejuvuzega.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/160e7db472d070---nanasawezaxitajukeferuzi.pdfIn PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607577f364bc9---34589843272.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c55a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC55A 16856 bytes
SHA-256: 8edb4e20962f97147fab609ae21469bac8485591506d05ca63057314b064a794