Malicious PDF — malware analysis report

Static analysis result for SHA-256 219ed7c0ee2ab7e5…

MALICIOUS

PDF

81.1 KB Created: 2021-09-09 14:53:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 03c87c8c53cd3b8d83c88b6ab668f366 SHA-1: a1f7435f440d6373d671e1352a6f57263c07a758 SHA-256: 219ed7c0ee2ab7e5de7898e93d0e26642196d8baa63a7b587b7311455fd42c9d
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The heuristic 'SE_CALLBACK_LURE' strongly suggests a callback phishing or tech-support scam, where the document prompts the user to call a phone number. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious intent to deceive the user.

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161344618c1ca8---kimizupuvelu.pdf In PDF document text
    • http://themetamorphoseprogram.com/userfiles/file/ramifuwuzitofig.pdfIn PDF document text
    • http://gmtshipping.com/attachment/file/54202212721.pdfIn PDF document text
    • https://tw-itemaos.com/ckfinder/userfiles/files/wiwuraxegup.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/rupezidudaligemo.pdfIn PDF document text
    • http://paulabenveniste.com/UserFiles/file/97691154849.pdfIn PDF document text
    • https://ladulceseguros.ar/noticias/fckeditor/file/43596235944.pdfIn PDF document text
    • http://wccflooring.com/userfiles/files/34182002360.pdfIn PDF document text
    • https://sheenabusesandcoaches.com/userfiles/file/dozoxefagoferozetikutoma.pdfIn PDF document text
    • http://bkm-market.net/userfiles/file/83933980149.pdfIn PDF document text
    • http://hutbephottaihaiphong24h.com/upload/files/6941890796.pdfIn PDF document text
    • http://haki.vn/uploads/files/7555785135.pdfIn PDF document text
    • http://musicincw.com/fckeditor/userfiles/image/bodami.pdfIn PDF document text
    • http://designerhouse.ru/upload/files/322811529.pdfIn PDF document text
    • http://kite-surf.sk/files/94815182945.pdfIn PDF document text
    • http://lakesnwoodskerala.com/uploads/file/liniwipex.pdfIn PDF document text
    • https://skl.deindrukdemo.nl/upload/files/xavujeren.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/u5s03mhpgq5hgc85erso0qcdqj/7610345138.pdfIn PDF document text
    • https://ljlconst.com/admin/images/file/nubekatilu.pdfIn PDF document text
    • http://cu-mbc.com/ckfinder/userfiles/files/72650627822.pdfIn PDF document text
    • http://nocleginaplus.pl/uploads/userfiles/files/zolanurepatexonubetodo.pdfIn PDF document text
    • https://studiecarriere.it/uploads/file/17225154290.pdfIn PDF document text
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/57161936569.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=ios+14+icon+pack+for+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_off0000d549.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD549 10512 bytes
SHA-256: 40e64e6f3c3dd1b71d49719c22baf37ad37552d540f3240239af1c0e2cee7222
font_01_sfnt_off0000ed64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED64 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010576.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10576 18760 bytes
SHA-256: 1effcbf24d8e7b0a4016e667b43f3585de31fa9b5cd808c6b8e92a6a41957c94