Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe010b4a136cc13e…

MALICIOUS

PDF

70.5 KB Created: 2021-09-06 06:35:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 93d0889eff378160aa1f3750def7fd23 SHA-1: 49b2546c31db5b7fc77ab31889fceb69aa0ffd1f SHA-256: fe010b4a136cc13e7f3554e6b1e2153d528fbc045f87cd458023ccebe853a255
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised CMS upload directories, suggesting a link farm designed to redirect users. The PDF structure and embedded content are consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://koddous.com/userfiles/file/56981859399.pdf In PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e80c596f931---15107927686.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/bd28e855c9d00a231770d129c37c6ef8/63544316247.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/85aac26711f41270422795a05e3f9908/kemuxuwabirugifunewag.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/a51de0723718f79dc352242743bdda07/diduvisupumataz.pdfIn PDF document text
    • http://somsit.com/ckfinder/userfiles/files/74268506787.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc115079912---dogoren.pdfIn PDF document text
    • http://beateromer.com/bilder/file/lolerunorimusovekomigazeb.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/d3a338e024dc4f1ad9890101d075d4b3/parilimixus.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160f7319eb47de---39296349250.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3de97788c5---lizodirizuba.pdfIn PDF document text
    • http://profitoolinfo.ru/ckfinder/userfiles/files/48862556498.pdfIn PDF document text
    • http://rs-entp.com/upload/file/wubiwolubukerepujoreju.pdfIn PDF document text
    • https://bunyaminerdemir.com/resimler/files/34318556649.pdfIn PDF document text
    • http://live-lessons.net/lcj/web/uploads/assets/file/66230694722.pdfIn PDF document text
    • http://polipack.ru/content/file/83705160648.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/94057157420.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/kaseravutusifug.pdfIn PDF document text
    • https://floresdeserrezuela.com/aym_image/files/21279866123.pdfIn PDF document text
    • https://aedwea.com/upload/foto/gegosuxefarepu.pdfIn PDF document text
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/fde468403e6280c98329e54d449b50f8/puxobipojodew.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e595f9d88c---44760941847.pdfIn PDF document text
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/al9hf441nvr850jhce79ih0dct/28981208757.pdfIn PDF document text
    • http://claudiamelchior.it/images/file/pifud.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/388448721da69667c9ac00ebe10abd92/rikonajosenupejo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=artificial+intelligence+in+military+applications+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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB536 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD48 14756 bytes
SHA-256: 7d1b139535ed2900c2a55890037a7b1426e297ea868a01ddafd60941e6a9d719
font_02_sfnt_off0000f2a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A4 11056 bytes
SHA-256: 6c8f0337a1056938d4c5ca13500b35fcdd9ec2865f82069ad4c50b04fa925180