Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9f04e5f914784ba…

MALICIOUS

PDF

66.7 KB Created: 2021-06-11 00:17:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 344b851f4360b56225491b3b70defe70 SHA-1: 1cb8e5af75f8ce254bca2c13659d161080ba1da2 SHA-256: e9f04e5f914784ba06d09ead0620642913eb331509f20c0b94adb73a302afc96
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model indicated a high probability of maliciousness. It contains multiple embedded URLs that point to compromised WordPress sites and a suspicious external URI related to torrents, suggesting a phishing or malware distribution lure. No scripts were extracted, but the overall structure and heuristic firings indicate a malicious intent to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://wastran.ru/uplcv?utm_term=fifty+shades+of+freed+torrent+magnet PDF link annotation
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/26f0c1bf55f51001cc664187a8f80501/96531628502.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/d8cead444319fea6b2e5f3bbfd150f84/tegipu.pdfIn PDF document text
    • http://terminsk.by/pics/files/89537169838.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b3e4db8bb---42224892324.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2814345093---guxopibemo.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607584dd2f7ea---45475553619.pdfIn PDF document text
    • http://frangarcia.eu/upload/file/97038923930.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/80c5d2aa745bcc1485508a75aa5e0d7f/83479134288.pdfIn PDF document text
    • https://apsco.ly/userfiles/files/nixusipezubowozufowusa.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/6l7qk069v668je9jl9lk18v3r6/saxodupetezagalejixa.pdfIn PDF document text
    • https://luminex.pl/upload/file/xajibomug.pdfIn PDF document text
    • http://ccsl.asia/files/lazibakenigakax.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/d40c9g8u10vio60ftvfjjtdscr/tefazaponikebivasap.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/9ee620f4d4012f9f0cff00ef51743b88/femapomadowawumufolar.pdfIn PDF document text
    • https://brandonsmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/r4oogcr9afmermbav0i3bb3dd2/55840784511.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/1acc85f1de3270b91fb8b04a6ac57447/11771766656.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a405b8ce5---96869460111.pdfIn PDF document text
    • http://permianhighschool1970.com/clients/e/ef/efee9fcbc667252fc4b649c8163d3733/File/sejadebigopelokesu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC769 5344 bytes
SHA-256: f7190c18d0dbd0f3d478c9fe55c38a71a749674219cb0ddb1a17d414a17a8284
font_01_sfnt_off0000d97f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD97F 10112 bytes
SHA-256: 319e481be5117431fa5d1abc4dc24f5205d6d92238a4bf37e4fa53ae9cd468ea