Malicious PDF — malware analysis report

Static analysis result for SHA-256 abaa93e130a97fee…

MALICIOUS

PDF

119.2 KB Created: 2021-09-05 13:17:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 44d61c23259ec5aaa39ac5513e0c0ade SHA-1: fe67e6fc0b8e839d2ea2b36f4375c0061b9e1301 SHA-256: abaa93e130a97fee80f6e84262ad2ee35ef5ad4fdc46ae70c6f1dafdd7b3c07f
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is flagged as a link farm pointing to compromised CMS uploads. The presence of embedded JavaScript and a high ML classifier score further indicate malicious intent. The primary attack pattern involves luring users through a deceptive document to click on links that lead to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://allytemp.ru/uplcv?utm_term=extractor+de+leche+electrico+vs+manual PDF link annotation
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088246548042---59816967667.pdfIn PDF document text
    • https://actor-conseil.com/files/file/23989876907.pdfIn PDF document text
    • https://catwalkdogcome.com/editor_upload_image/file/89602062329.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/3esd95ncqti3ifaiascfnbl6bp/vonigumidozuxobemojizenop.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/8c87e55c31b2efd9310a458a56ca6391/movudiwasaxafelopeda.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16088001f78f3f---27201058239.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/13f85d20873fb4fe5b9e555603a2db39/61960932309.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/videgejenowuvif.pdfIn PDF document text
    • http://sdds.be/userfiles/file/wobanexedijojimevosuriman.pdfIn PDF document text
    • http://kleinschadenexperte.com/userfiles/file/79682582953.pdfIn PDF document text
    • http://rama-sp.com/rama/webroot/js/ckfinder/userfiles/files/18546219761.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160c8deff1408a---ruxesukogutifoju.pdfIn PDF document text
    • https://kawanmto.net/contents//files/wivisu.pdfIn PDF document text
    • http://614move.com/clients/4890/File/95859601786.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/k45voak1o4en2g658se925gbdl/79074436653.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/8af5181d81797943590cfb64f6fcc6d8/88698821299.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d5ad3b1473---82602407228.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1613172c473a05---gaviwejujebifi.pdfIn PDF document text
    • https://collegemahan.ir/basefile/collegemahanir/files/fipevur.pdfIn PDF document text
    • http://dhf-china.com/d/files/28276423144.pdfIn PDF document text
    • http://www.temaricerca.com/entry2013new/admindia/ckfinder/userfiles/files/5398294843.pdfIn PDF document text
    • https://picinterior.com/ckfinder/userfiles/files/fusirijinigomuveriw.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608ffc7f0c081---xunelukogigosuwikox.pdfIn PDF document text
    • https://ptkas.com/kingkong/userfiles/files/71100964959.pdfIn 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://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_off00016bda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BDA 19192 bytes
SHA-256: 2ec8f117ef39867f7bf6a1d0a1e123728cf894bff6d0abba6dd185c1a6659631
font_01_sfnt_off00019d72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D72 10884 bytes
SHA-256: bbc83e29f292e74741dc62c79673e7cee8adce627548068a7c9457e70d5f49bd
font_02_sfnt_off0001b67d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B67D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1