Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc8b5dab8b1d58fd…

MALICIOUS

PDF

82.0 KB Created: 2021-09-05 08:22:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 3cb5a32819f7bb00fa894658e46466b0 SHA-1: edc75326ee2eafa0bdf36c3a5ff37d0eb06f2f5e SHA-256: dc8b5dab8b1d58fd92fd572be694421fe6eab0095d6bb7f4691936f059a8ee98
156 Risk Score

Malware Insights

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

The PDF file contains numerous links to compromised websites, indicating it functions as a link farm. These links likely lead to phishing pages or further malware downloads. The ML classifier and ClamAV detection strongly suggest malicious intent, with the file being identified as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076333966b14---vanuvarupujizudumusa.pdf In PDF document text
    • https://promtong.com/promtong/temp/file/miwilolunosubora.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/5897406165.pdfIn PDF document text
    • https://ssmavidiyar.com/public/content-images/files/42363294604.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160ab4b4ed7035---30384051042.pdfIn PDF document text
    • http://eurekaloggers1970.com/clients/a/a4/a4917853023b9a70bc4506ca58f09c65/File/49188548469.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdcdf9dade4---bisamugolopogojow.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/971f261199701120141694d0aeb0faaa/99178234260.pdfIn PDF document text
    • http://kevinmcallisterlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sepozi.pdfIn PDF document text
    • https://rafaellopezehijo.com/upload/files/39405756609.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/34a93640bdb07517b417699bf4fd0c27/4544939190.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/jokawovalabomakozeki.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ed3067aaf---14994191792.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/92531179a384ddb27b8dd708993d1f99/zirenotodazadorekij.pdfIn PDF document text
    • http://wuxihemei.com/ckfinder/userfiles/files/20210630_151700.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/56df205ff52f3c496d181d70b3999e01/93343599118.pdfIn PDF document text
    • http://asremajazi.com/uploads/files/7371139108.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c36d384ac19---wawinasakegirasuxow.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/4d357cd0770b16c5dca5d3a8948afef7/lekupebo.pdfIn PDF document text
    • http://chalappuram.com/userfiles/file/mipodonujeginafibol.pdfIn PDF document text
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/4c450102eafb7d955e15f5bad9020156/xozunimonologojoberutuk.pdfIn PDF document text
    • http://canadapremiumlubes.com/survey/userfiles/files/70684195258.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=academic+ielts+test+pdfPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB8F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A6 10440 bytes
SHA-256: ccfac28d280ea7348041aad5cf417dc6089a2cf4089348e4cba557c7b15ca7b5
font_02_sfnt_off00010b55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B55 18508 bytes
SHA-256: f7c40dd01de5db787845469408b6d16dffffef6adf35f29b291e248084172881

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