Malicious PDF — malware analysis report

Static analysis result for SHA-256 1edb0b15ec0f4e23…

MALICIOUS

PDF

91.1 KB Created: 2021-08-13 06:20:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fef12f8dd9243e8f53cf9ed0a325d3d1 SHA-1: 8ccd421ea77c7810d478552ff9e99876b35711f5 SHA-256: 1edb0b15ec0f4e23a2a4bd173e8d0d00d95c285f006a84c3abc7b136f037f7cb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to numerous domains, many of which appear to be compromised WordPress sites or disposable hosting, suggesting an attempt to distribute malware or phish for credentials. The embedded URLs, such as 'https://nomylo.ru/uplcv?utm_term=latest+bollywood+songs+collection+zip+file+download+2019', are designed to lure victims with deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9910

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 https://nomylo.ru/uplcv?utm_term=latest+bollywood+songs+collection+zip+file+download+2019 PDF link annotation
    • https://markyatirim.com/resimler/files/99823951311.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a8545156467---lesarixufuzaguzi.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/42920599830.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/cd633c83f28569d267e814e4ac3ba165/31427474670.pdfIn PDF document text
    • http://imhyuk.com/imhyukeditor/userfile/file/jagelazirusadiji.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608fe2981e2d3---luvowidopo.pdfIn PDF document text
    • http://artsar.pl/userfiles/file/kedokawogikagozidupe.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ce75b290e---jukekifefedujalar.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/49f31c6d7fc193b928829b36803344bf/44677461883.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b9958e6bb47---xapigovegebelulow.pdfIn PDF document text
    • http://wumag.pl/userfiles/file/ragiduzaniwosuw.pdfIn PDF document text
    • https://dongcohonda.com/userfiles/file/malelepuwowudurupirobupiz.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/160a982014ef68---dabitefatitij.pdfIn PDF document text
    • http://venusland.vn/app/webroot/img/files/77579977390.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/5ffbb141939e6eaeb876fd587cbcc640/39990123720.pdfIn PDF document text
    • http://cuboni.com/uploadfile/hong202108041536429571.pdfIn PDF document text
    • http://vervesimuhub.com/userfiles/file/legok.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b29512e66e7---4259568458.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/f127046ea4b3c9ebb2adb9aaa9196c5d/juvafujubevigeletes.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a192df49d00---tobajek.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/5411300666e6b21193ad581c39ea22ab/48317637766.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/jj46klapjaq500cg4ugb4ljmpk/32610038901.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a18f4ebc0e0---vovigapurovawuju.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a6fa3cef533---2600386745.pdfIn PDF document text
    • https://stmpallet.com/ckfinder/userfiles/files/xepeju.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA78 11516 bytes
SHA-256: 8f9990b89c036689fa91808354902e4cc4c7f0ebb614423aa93c90c483701679
font_01_sfnt_off0000f59e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59E 2020 bytes
SHA-256: 4d47c893ac313c47f9423a0f720aa3f2b0423917492269336468cd27fe860e53
font_02_sfnt_off0000fee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000116f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116F2 16276 bytes
SHA-256: 98aff72f982070a5baa77e7b7d9d202cd92db0f7bde72b24465478209f81d015
font_04_sfnt_off00012ce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CE7 18196 bytes
SHA-256: b5bb31a1dec647c2525307cb85db92db23b701df3072e318d139763609dd3f88

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