Malicious PDF — malware analysis report

Static analysis result for SHA-256 294d44ca5d1a2a3c…

MALICIOUS

PDF

85.4 KB Created: 2021-08-12 03:52:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6842844553ac59e650507bb4bfc0c87b SHA-1: ae3c6aa052430869ab0046f85cc9553c0f154ee0 SHA-256: 294d44ca5d1a2a3c7b60f9e013dd2c133d0c42c774e820e08c3b8ed0877d44b2
196 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous links to external URLs, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution scheme, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://smidgel.ru/uplcv?utm_term=how+to+add+a+list+of+figures+in+word+2016 PDF link annotation
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/e7enagrl4fl23e0q3g7dec2f2u/rumolakubutokimizetabafuk.pdfIn PDF document text
    • http://jerseybankruptcylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/44075339476.pdfIn PDF document text
    • http://eventcompany.org/clients/e/e3/e30ef11cf4efe639fe6592aa37b9cb94/File/10478575789.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607dee8b47565---70855046069.pdfIn PDF document text
    • https://nasikampung.info/contents//files/73653274092.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/0uhv96ta4rdi3gtcin15jcuucr/lajisozun.pdfIn PDF document text
    • https://istihdamhaberleri.com/upload/ckfinder/files/guraw.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/79797823835.pdfIn PDF document text
    • http://caycanhtuyhien.com/uploads/image/files/larumulapawarofixibidini.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/3k80d0egqh4b210asjiqhd1hi7/zulovovubilaporexurag.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee7ba7c6c3f---pidubomojokibova.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/4b58daf79a0546c92cbff8a3ccd6e79c/50796530824.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/sikomojakemo.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/63552346557.pdfIn PDF document text
    • https://mebelihome.ru/upload_picture/sijebejinisavarebijizuz.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d61af496559---midijofeboxubilabuso.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/rdg6o8g654u6scim88fse7p1vg/juxef.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb2a51768ac---658558313.pdfIn PDF document text
    • http://juentai.com/userfiles/files/xuzexelisomepoxulevusobaz.pdfIn PDF document text
    • http://veterinariomauracotti.it/userfiles/files/28078997542.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/th550gbm9vb0nc0fu5j23pkvfj/bikaxereliwolukijemero.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/vfik94aelj161tcgaclm2otdun/xisije.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608574f34aacf---58250936069.pdfIn PDF document text
    • http://www.sealjet.mn/pictures/files/josidi.pdfIn PDF document text
    • http://ambulatorioveterinarioilghirlandaio.it/userfiles/files/jubatugi.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/e54eded65746a931735bde2ab2117fae/funabimijogulesujobenofev.pdfIn PDF document text
    • 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_off0000e7f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F0 11168 bytes
SHA-256: 1862d07c84e808d7e2c585df25f030c1f7362822fd4698bab1fb73e75ff566cc
font_01_sfnt_off0001021d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1021D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A2F 17124 bytes
SHA-256: 901923e08445bc8237396cd29a90d0a9a4a6b3916b179c535731c666dab25e7f

Open this report in the interactive analyzer, or submit your own file for analysis.