Malicious PDF — malware analysis report

Static analysis result for SHA-256 fec51596d2e703d6…

MALICIOUS

PDF

79.7 KB Created: 2021-06-25 20:42:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6b12bf82ed7b50e0fe02b351643fa07a SHA-1: 65912a6b48afc7fda0557e3f0701651e8b4dd0a1 SHA-256: fec51596d2e703d67862bfeb74c4c3554085377cccfa3a5c2abc12adcdf50412
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it is likely a phishing or malware distribution lure. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. No scripts were extracted, but the presence of external links and the 'link farm' heuristic strongly suggest an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5698

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://ketchas.ru/uplcv?utm_term=be+more+chill+the+musical PDF link annotation
    • https://amatnieks.lv/pictures/image/87401603932.pdfIn PDF document text
    • https://dotcomtravelegypt.com/userfiles/files/67737697840.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c30ea5d6867---25624346853.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160841bfd6aef1---30646517709.pdfIn PDF document text
    • https://najlepsze-w-polsce.pl/uploads/dixabawezabemesejajavixu.pdfIn PDF document text
    • https://bandotrading.com/uploads/file/57325355373.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/10427093964.pdfIn PDF document text
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083cc93eac68---sonenekirono.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/f5ca7a9df48ff7d6c750b3fe2a0cfd28/97536584333.pdfIn PDF document text
    • http://adveotec.com/img/file/12088017622.pdfIn PDF document text
    • https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a825ba6e58a3760a03055d1356dba607/gunuwarobetobaje.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/0482637a865b265d1b01f412006c7f81/xugebo.pdfIn PDF document text
    • http://tuclubcr.com/campannas/file/fapukudekovefanumelabe.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/fdb035f711a052e101860476f43ea8e8/mikimaregoba.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160cede6d0df95---wujatogimoxanorejazali.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e020168582---55553989107.pdfIn PDF document text
    • http://jncs.kr/page_data/file/20210621233713.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/3952652327.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077fa57a55fe---20349919028.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b19680e5992---98538249860.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/701rimvp6oe02m6sl44707osfc/tozawagegipugap.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_off0000f280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF280 17140 bytes
SHA-256: 8abb692ce06ceaa6e8da95dcde2cb84c9e96ecd070b40a70909688cda4efe95c
font_01_sfnt_off00011f27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F27 10544 bytes
SHA-256: a79589cb79667ffb5f5ee4dab3f3305f6596b3903ddedf2da6c69fd6795234f4

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