Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab0ac019f701bc12…

MALICIOUS

PDF

88.7 KB Created: 2021-06-28 00:17:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bcbe0a26004031b6ffe2b8c8c1377914 SHA-1: 646288ca0a5f06430dfae1fd1e56dffb438e37f8 SHA-256: ab0ac019f701bc123ab258dd4f21a1f729de42f6e395f366bb802481154e6632
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. The file's structure and embedded URLs align with common tactics for distributing second-stage payloads or redirecting users to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16086fe9b0bd9c---tiwamatavazox.pdf
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16083f0e93b383---48829178187.pdf
    • http://webhenevents.com/clients/868374/File/wamitixadukoxuvasatupupa.pdf
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/904103705bd169bb28d8732497495542/novalefejewitaza.pdf
    • http://thepnguyentran.com/media/ftp/file/42319112514.pdf
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/ug7v9f1984lptla3ifupnu5nrt/zakuxedamabiwi.pdf
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/asj2mo2l6glhofatmlniujb7ee/16572359914.pdf
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b34740e1e4---28159030445.pdf
    • http://zulaikhatextile.com/userfiles/files/fosiziwana.pdf
    • http://ngor2-3.com/file_media/file_image/file/27026326599.pdf
    • https://samarpanbharat.org/trila/userfiles/file/50287515431.pdf
    • https://bursakaynak.com/userfiles/file/95707926291.pdf
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16071350e2eb0b---vametopulinupe.pdf
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160d3665b50f81---zuvagusamixake.pdf
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/bf9d4f617f78d858a9d13bc080f71f99/dupesogenirarifawevo.pdf
    • http://jkmdc.com/aversystem.com/userfiles/file/suwubipamifemogovoket.pdf
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/040991f1183aa8468a457e1488c9556e/sijeza.pdf
    • http://uelzecht.lu/userfiles/files/57864824106.pdf
    • http://4reality.cz/userfiles/files/fojupu.pdf
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/bh7t0p3v46hnubg2q7fa23prk6/85358557028.pdf
    • http://hilimall.ae/uploads/files/36532694954.pdf
    • http://alliance-ltd.com/userfiles/21713185969.pdf
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b407a750299---40513967279.pdf
    • https://belhasasecurity.com/userfiles/file/voluvorivovuvetar.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=how+do+you+say+language+in+spanish
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f5c5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C5 16792 bytes
font_01_sfnt_off00010dd7.bin
95003d4c190f60c02bfa2ffc9bfcbfab7a8ce4674821f235ac73f8c0425fda02
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD7 18780 bytes
font_02_sfnt_off00013cf1.bin
c20cedf02755a0bc9ccb12488ed1924a9b28724da16a3ff5795af13b6b58eb17
pdf-font-stream PDF embedded font (sfnt) at offset 0x13CF1 10764 bytes