Malicious PDF — malware analysis report

Static analysis result for SHA-256 648602082003890b…

MALICIOUS

PDF

82.8 KB Created: 2021-09-04 04:07:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 98dd30dd6a612f838c5f7bbc00cc7b6e SHA-1: b663d4502a2bb102a7e8931b5e86819aaa12982a SHA-256: 648602082003890b93541b3a5c610a94361139905e18f7849a6e61cc9050a18a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external URIs and link farm heuristics, indicating its primary purpose is to redirect users. ClamAV detected it as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. While no scripts were directly extracted, the PDF structure and URL patterns suggest it's part of a phishing or SEO manipulation scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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
  • 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://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/4bfd8531b71acc51b904508de7d148f2/15134190983.pdf In PDF document text
    • http://taociren.com/upload/file/210725010658427877pn1ubvxmdyyx.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/63636598286.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a224bdcbb31---25161906716.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/42ol4q2r7qb8tqd03brj0khvho/26673577542.pdfIn PDF document text
    • http://righetti-ticozzi.it/userfiles/files/8646342842.pdfIn PDF document text
    • https://bustotoronto.com/userfiles/file/fenanenenolemisesokabav.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5b43f5d9d0---nazozubulize.pdfIn PDF document text
    • http://chiaranannini.com/userfiles/files/texadaxab.pdfIn PDF document text
    • http://hataylezzeti.com/resimler/files/jujunu.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160976143b08ed---98792100889.pdfIn PDF document text
    • https://opsclown.it/ckfinder/userfiles/files/womezujevem.pdfIn PDF document text
    • http://parfumerieindex.nl/images/uploads/94973247911.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/lppp07ob15hir3aa0dt78tqj9h/53868345824.pdfIn PDF document text
    • http://cnmrobotics.com/files/files/29410334233.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/90f07cc7ef375db29793fd9590ba9ce2/76306214419.pdfIn PDF document text
    • http://9262895.ru/ckfinder/userfiles/files/gosixu.pdfIn PDF document text
    • https://opsclown.it/ckfinder/userfiles/files/tipakovesopodaba.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/f510tv1fgbah5s97t23eikuf73/gevazunebosexukuvanozi.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609db6442e256---tosifa.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/6hi585899c1cq4nrujunjcqcgr/pipimekalivapezijurotoji.pdfIn PDF document text
    • https://electrabicycles.pl/app/webroot/uploads/file/16302801992192.pdfIn PDF document text
    • http://ottotech.center/userfiles/file/50543624684.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=chevy+cruze+2017+manualPDF 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_off0000dc62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC62 10732 bytes
SHA-256: f5f54ce24371be20f4b18e45d52e7132dcbcd789d8aa80f446e35f7c2d8d7073
font_01_sfnt_off0000f513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF513 18504 bytes
SHA-256: 4c0914983dd8e1bcf37534160f8440a429c812cb0596fb9dbda478a680420983
font_02_sfnt_off00012591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12591 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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