Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddacdc2f9a0f5993…

MALICIOUS

PDF

69.6 KB Created: 2021-09-12 04:15:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 8b190e3d420886eefa395d97270a23c5 SHA-1: 0d39c4f622f44d925e12f04d0f2b9a128cc867f0 SHA-256: ddacdc2f9a0f599361726e4087fd63e75a9b8625218cea109a184fcdf8941a67
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution attempt, likely using T1566.001 (Spearphishing Attachment) as the initial access vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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
  • 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://innotack.com/userfiles/files/38811021652.pdf In PDF document text
    • http://ilkjv.com/Images/Media/files/61348534263.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/wobijadademozipozofodor.pdfIn PDF document text
    • https://kibledergisi.net/resimler/files/21703968658.pdfIn PDF document text
    • http://www.emploi.nat.tn/ckeditor/ckfinder/userfiles/files/temolule.pdfIn PDF document text
    • http://goref.ru/files/file/53017441257.pdfIn PDF document text
    • http://elosc.com/upFile/file///ITX202109120829371665.pdfIn PDF document text
    • https://serviceservice.eu/userfiles/file/gomopugaruzudipirex.pdfIn PDF document text
    • https://jetaime-shop.dvsportbg.com/files/vorumojodufokasutitese.pdfIn PDF document text
    • https://sjamsul-hidajat.id/ck_uploads/uploads/files/61360826314.pdfIn PDF document text
    • http://xn--80aaaaadfwa5aftjhxrkcrg8iwc.xn--p1ai/pict/file/natimiluf.pdfIn PDF document text
    • https://rodolphe-blanchet.fr/Rodolphe/fckeditor/file/58327958475.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/c07f80e07f09b15080928c92ac76c402/ranotexosibigimogifebo.pdfIn PDF document text
    • https://ispartaorganizasyon.com/ckfinder/upload/files/sizagotuzulipimememug.pdfIn PDF document text
    • http://wolfpackbasketballacademy.com/content_docs/xerirul.pdfIn PDF document text
    • https://buddhaart.in/userfiles/file/gawipokibanobe.pdfIn PDF document text
    • https://speak82.com/_UploadFile/Images/file/mosirumipodugavoj.pdfIn PDF document text
    • http://espwireless.net/uploads/file/42967138169.pdfIn PDF document text
    • http://dostavkaturov.ru/files/file/99370031135.pdfIn PDF document text
    • http://bertrandetgastineaudesigners.com/userfiles/file/25052637470.pdfIn PDF document text
    • http://fuhua.tumujike.com/assets/upload/files/202109020943148539.pdfIn PDF document text
    • http://mulroyenvironmental.ie/userfiles/file/vedobikilolujox.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/31f938da2259217b6d6f813b28836fd1/feziwopuf.pdfIn PDF document text
    • https://bem-sa.com/img/file/72695479423.pdfIn PDF document text
    • https://www.akilciilacdernegi.com/ckfinder/userfiles/files/49449392535.pdfIn PDF document text
    • https://nevjegyzek.eu/uploads/file/doreru.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=download+onlyfans+photos+androidPDF 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_off0000b431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB431 10664 bytes
SHA-256: b9cc80a8ab59b21a4d5853850d623c10c3b149ca6c7829ad7276e12699481998
font_01_sfnt_off0000cc98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC98 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e4aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AA 14284 bytes
SHA-256: b78b4b2335dcb8274281932fe4f2552cac54f8518651f699449e0d74b5c9ef40