Malicious PDF — malware analysis report

Static analysis result for SHA-256 869858f8b20f518b…

MALICIOUS

PDF

83.6 KB Created: 2021-09-04 16:20:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 59246a712eeabffd83929129d9d4d4ea SHA-1: ebaf0cffca013047d49d28a97c5fb54c254018ad SHA-256: 869858f8b20f518b1bb488e04cdd3cce542384bd7dc4c016e126b94ad91e6654
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document contains a link farm pointing to compromised websites, likely intended to trick users into downloading a secondary malicious file. The presence of multiple links on disposable hosting and compromised CMS uploads suggests an attempt to distribute malware through deceptive means.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://pianoinprimopianofestival.com/uploads/file/tadafu.pdf In PDF document text
    • http://fresh-j.info/images/uploadedimages/file/mobokomeverobetet.pdfIn PDF document text
    • http://nicolalazzarotto.com/userfiles/files/jowuduzexake.pdfIn PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/8pul1h14co992959r7rhvpm1vi/mijukerosi.pdfIn PDF document text
    • http://dermalab.pl/userfiles/file/zuwixaf.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/d3ea7db052157c4fbfa85de0c32010ae/53247903447.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/ma9p76q02ila5psmdpebcu0biv/guvepuvaxowubalim.pdfIn PDF document text
    • https://www.kunapak.com/wp-content/plugins/super-forms/uploads/php/files/hn385hueja4265v2kl3p0j59tp/ralagiduponemoz.pdfIn PDF document text
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/0hg25ob25dbnaqdgb7je56ei7g/muzimuxuvi.pdfIn PDF document text
    • https://krzczonowice.pl/gfx/file/losomidedifasoxuru.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607f10ebc13d9---79571819104.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/4135579458.pdfIn PDF document text
    • http://leebyunghun.kr/new/upload/board/files/87148170408.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/75dd1f72e3dc9a63593644ca039eb9bc/kikob.pdfIn PDF document text
    • https://falconshipping-uae.com/userfiles/files/vefisavezigalekokoxi.pdfIn PDF document text
    • http://burfel.ru/upfiles/files/wojadirikazarosetoren.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/8b823cfc1cad8e63b18d62afaa8e3fa1/taxenolubozovolopekakel.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/4b4ede4a2f17e50a371ac9a0d267fb80/78085532311.pdfIn PDF document text
    • http://atomiccm.com/userfiles/files/88044460657.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/ankvudf4kibbs4i09n293s9la1/74629665693.pdfIn PDF document text
    • http://ibiforstarlight.org/clients/3/3c/3cfcca4e360ca8807b7dd7d6e7cbeae0/File/xududidati.pdfIn PDF document text
    • http://usefchina.com/uploadfile/file///2021081412174742.pdfIn PDF document text
    • http://manixcnc.com/ckupload/files/6898426368.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0d3b15407---44761583663.pdfIn PDF document text
    • https://www.rockfallco.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f108d282ad---53458048636.pdfIn PDF document text
    • http://dzbnf.com/upload/file///dabumasirivafazumused.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=download+adobe+pdf+apk+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_off0000e1a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A7 10544 bytes
SHA-256: 2fd6c4de0c13151eebb7ab161e518c3dd37482f634806c3f1d4107d4b08d4bde
font_01_sfnt_off0000f98d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001119f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1119F 18216 bytes
SHA-256: a50a82a7c806da6252d4dc05479342708116c55fd9dd89beef84208609b1aafc

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