Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1565a95476e53bb…

MALICIOUS

PDF

74.9 KB Created: 2021-09-19 04:54:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1fc248d0891f5726128ba36980525050 SHA-1: dacb3229257e0d34c859ff066a3bf36fd6de37e4 SHA-256: a1565a95476e53bb7711de04ebc59bf8468f37214650ee657cb75940fcefbfbe
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm or phishing lure. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. While no scripts were explicitly extracted, the PDF structure and the nature of the URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3916

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/uplcv?utm_term=euro+truck+simulator+2+apk+for+pc PDF link annotation
    • https://www.jnvhardoi.org/ckfinder/userfiles/files/bigulinej.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/doxalizezajowizibule.pdfIn PDF document text
    • http://stellar-toys.com/ckfinder/userfiles/files/wegaxebukoledojunudigi.pdfIn PDF document text
    • https://ispartaorganizasyon.com/ckfinder/upload/files/getojujogizer.pdfIn PDF document text
    • https://livstyle.ro/home/livstyle/public_html/uploads/files/xupepelevarowo.pdfIn PDF document text
    • https://xn----8sbcehyodmtf1czh.xn--p1ai/userfiles/file/merobedunoxupe.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/161450c4419f51---dovedi.pdfIn PDF document text
    • https://palezieux.com/ckfinder/userfiles/files/fagonawidemexi.pdfIn PDF document text
    • http://yuc-fac.com/uploadfiles/20210910000855.pdfIn PDF document text
    • https://commonwealthsportsawards.com/userfiles/file/xoxisaripuxo.pdfIn PDF document text
    • http://zjgyuanhong.com/v15/Upload/file/20219161048473008.pdfIn PDF document text
    • http://medicaldistri.com/ckfinder_files/files/tiguriluvetowemeliluzum.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132593f2d741---popuwevomekok.pdfIn PDF document text
    • https://equinox-e.com/upload/UserFiles/file/21719864576.pdfIn PDF document text
    • https://semut73.com/contents/files/vudukorezajatifa.pdfIn PDF document text
    • http://coaching-scolaire.net/userfiles/file/11611870674.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613bced4ea4f3---kinelebitakupesemoxukiba.pdfIn PDF document text
    • http://mesterteto.hu/userfiles/file/tasizivorolida.pdfIn PDF document text
    • http://hidramaco.com/files/files/99112874221.pdfIn PDF document text
    • http://ltpbetel.ro/userfiles/file/nusatedunoluwitanat.pdfIn PDF document text
    • http://studiocommercialedelpiano.it/userfiles/files/fatajekoxofuwuviku.pdfIn PDF document text
    • https://www.aaptuk.org/ckfinder/userfiles/files/70924554311.pdfIn PDF document text
    • http://thietbiantoanttk.com/uploads/files/jumikog.pdfIn PDF document text
    • http://fruitsad.pl/images/file/bewitarimilekub.pdfIn PDF document text
    • http://arc-en-cielproduce.com/ckfinder/userfiles/files/73903460062.pdfIn PDF document text
    • 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_off0000e328.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE328 10700 bytes
SHA-256: 12d3202263005f83ee6bd9891fea06624b4d2fce5b8bdd8f5545eeb733016145
font_01_sfnt_off0000fbd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1