Malicious PDF — malware analysis report

Static analysis result for SHA-256 e952cac92efdac6c…

MALICIOUS

PDF

82.5 KB Created: 2021-09-15 23:22:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0a09cba32a9c4f6ddca1ee9b8f55dadf SHA-1: 1b00cb2e13bb218bd9cd428f0bb1508db5aa4952 SHA-256: e952cac92efdac6c4597afe3fbb69586ae476bd05156e7432585c58a6fca332f
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous links, many pointing to compromised websites or disposable hosting, suggesting a link farm or phishing lure. The presence of a link to 'minecraft pocket edition mod packs' indicates a potential lure to attract users interested in such content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • 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
  • 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 http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613ed34364b08---2813719571.pdf In PDF document text
    • https://wildarium.com/ckfinder/userfiles/files/mobezesuvokininibuvovi.pdfIn PDF document text
    • https://www.frontiermea.com/sites/all/libraries/ckfinder/userfiles/files/585302320.pdfIn PDF document text
    • https://vzglavniki.net/data/file/letumemanunonumifununuf.pdfIn PDF document text
    • http://tomgiongvip.com/uploads/files/file/taxobivofof.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/1e1201c46c604b03fc1cae74b73dbd49/ferenafos.pdfIn PDF document text
    • https://piauiaqui.com/ckfinder/files/43488533074.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613beb954ac9a---mebopuwex.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/a3a308ca43fde12be0d30796665bbc2f/xorivebipas.pdfIn PDF document text
    • http://yavuzselimvakfi.org/resimler/site/files/86068505367.pdfIn PDF document text
    • https://institut-arabe.org/ckfinder/userfiles/files/94859204457.pdfIn PDF document text
    • http://humidorio.de/ckfinder/userfiles/files/vekijove.pdfIn PDF document text
    • http://kfnmdg.com/upfolder/e/files/20210904003643.pdfIn PDF document text
    • https://metnar.pl/web/uploads/files/laluf.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/gibefatoja.pdfIn PDF document text
    • https://alpinashop.bg/files/56690775088.pdfIn PDF document text
    • http://texmet.pl/userimages/file/95561373092.pdfIn PDF document text
    • http://acm-medicali.it/userfiles/files/74295958937.pdfIn PDF document text
    • http://radissonhoteltraining.com/userfiles/file/8970244972.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/rb4odili0grrtc6457p81cm3bi/96687204699.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613c72db163a3---tolavulewipovidup.pdfIn PDF document text
    • https://artistprasanna.com/userfiles/file/sinapo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=minecraft+pocket+edition+mod+packsPDF link annotation
    • 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_off0000de89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE89 17564 bytes
SHA-256: 326527e2c75ce4d7a2ecd9744cec992e2d4f096f04dc174478bbd3d81fd1a733
font_01_sfnt_off00010be8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000123ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123FF 10820 bytes
SHA-256: 3d366dcb26f0f58b0e9ddd18e2eaee58d3ece68bc3e5e8b50b5f1f9e65e885cc

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