Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa6486fd0fc012c3…

MALICIOUS

PDF

93.0 KB Created: 2021-09-06 01:17:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 018c3a3da1f6952fd88c6f0aa46c3f28 SHA-1: 6bad8cb7c407a20a3af74b2a01eef94c13b14079 SHA-256: aa6486fd0fc012c37f147e1f8c99df6b40874225abc40c45de6903fc6f321e84
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed for malicious redirection. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://pn-tech.net/userData/board/file/wotuxalotuzakubewutemope.pdf
    • http://wskinbody.com/data/boardData/files/89165885463.pdf
    • http://abwbaltimore.com/uploads/files/66246497339.pdf
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/7974f49e768a546ffbcc9bf00574dc39/59599910366.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16116d9d6c3137---41336019805.pdf
    • http://mai-colle.jp/userfiles/file/wanezipefegup.pdf
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/aa94bbac2fdfa3cf17c478b24f38e19a/37241091279.pdf
    • https://alienaquatics.com/home/gb/public_html/ckfinder/userfiles/files/47660307915.pdf
    • https://eurotig.ro/file/34851069125.pdf
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/69bffe9cea523c82b364a66573d38642/kipubajiponuna.pdf
    • https://agrilaui.com/userfiles/file/somipaw.pdf
    • http://nessium.fr/userfiles/file/kikiwedifateminuloxa.pdf
    • http://www.yoko-ono.be/images/userfiles/file/62309737061.pdf
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/c6726b0d8a55ea90acd91529ea345903/kelagubetunovigorak.pdf
    • http://assytekservizi.com/userfiles/files/35420060988.pdf
    • http://auksozvynas.lt/userfiles/file/58881781100.pdf
    • http://alexlunacoach.com/img/editor/file/resofukovaref.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/16078660450866---53675000224.pdf
    • http://larrysiegellaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/94284445174.pdf
    • http://pjteam.hu/uploads/deropebulugasemojagumevow.pdf
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c54a283f6d---panekufere.pdf
    • https://scavilecis.it/userfiles/file/85673412252.pdf
    • http://anhuishangbiao.com/upload_fck/file/2021-5-13/20210513154230350219.pdf
    • http://qca.ch/userfiles/file/88309515049.pdf
    • http://www.petersonassoc.com/emailimages/file/23357065419.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=shine+on+crazy+diamond+tab+pdf
    • 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_off00010343.bin
2abadb369e8ef378e5657369fd534afb6d9a2edf479ad90bcfc88e669962e35f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10343 18660 bytes
font_01_sfnt_off00013445.bin
0599a6daf636b6f95a65a497ffe564100c419bb4eebd1e9a654128feaf54a1f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x13445 11060 bytes
font_02_sfnt_off00014db1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14DB1 16792 bytes