Malicious PDF — malware analysis report

Static analysis result for SHA-256 aad35e0344336b4d…

MALICIOUS

PDF

85.6 KB Created: 2021-06-29 01:24:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 31fd7b7a2209b4f890582f26116dacb3 SHA-1: 3364f6c0c0e9ead4cafa341fb16e48bb7cf3a20f SHA-256: aad35e0344336b4dcf07e2e82516282b09f023d2e48c231788825d3304490e00
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and by a machine learning classifier as malicious. It contains numerous URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The ClamAV detection of 'Pdf.Phishing.Trojan' further supports its malicious nature, likely intended to lead users to phishing sites or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 https://garglob.ru/uplcv?utm_term=advanced+passive+forms+exercises PDF link annotation
    • http://perfekttorun.pl/pliki/4522607857.pdfIn PDF document text
    • https://cengilli.com/icerik_images/file/sowasixalegatogobi.pdfIn PDF document text
    • https://fnb-concepts.com/images/uploads/files/33564445448.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/ku5ig1pivec7la4fq5r35bdq4d/23923200266.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/ed8dc300fd9eebfe9e6b913af1a3f54c/16619140043.pdfIn PDF document text
    • http://angarakshaksecurity.com/userfiles/file/jinenogamobabi.pdfIn PDF document text
    • http://hondatayho.top/img-ngocbao/files/tikogotuwefokuruzafogel.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/d0dbbe746e9f82e34840b904e8fd9b7f/17656025978.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1f1b7193a---masovoputanukoja.pdfIn PDF document text
    • http://fygl.net/uploads/file/04102740111.pdfIn PDF document text
    • http://golden-candies.ru/webroot/files/files/galulujosudasifokakitak.pdfIn PDF document text
    • http://smclassof57.org/clients/34860/File/gajijonerakamuwaxu.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c3bfe148df7---66672218482.pdfIn PDF document text
    • http://rogo-rotterdam.nl/files/zekiliruradesifizu.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c1e72223671---35727286490.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095d58bd8162---rezalefufuvobenu.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4835eb899---girusazisomonet.pdfIn PDF document text
    • https://prosperitas.be/data/assets/file/91598888557.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/g1kkpo57q79924ua98h6t2cpm1/88354306769.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/e287ee4f9ade86940e96c0b74638d82f/jiwuxibikikodawamamiroko.pdfIn PDF document text
    • http://brickchamber.com/ckfinder/userfiles/files/85645449925.pdfIn PDF document text
    • http://ebbers-schilderwerken.nl/uploads/files/65906531158.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

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_off0000e953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE953 10784 bytes
SHA-256: 946c782d6742519fcf36b1df0ce8292d3a84e722994ba0317a7bd399e2e051a4
font_01_sfnt_off0001022e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1022E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A40 17484 bytes
SHA-256: 257fbf9580c218e21c1b078e95a86c51325c1ce8d881b14df0dcadfc961dee14

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