Malicious PDF — malware analysis report

Static analysis result for SHA-256 805971fc1c2ecb39…

MALICIOUS

PDF

83.1 KB Created: 2021-07-14 00:02:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: b2a6d2d7cc2abcecb5a7ddc3f8570cf6 SHA-1: a1a44996f6230f3465a1eb54a8493995290cd321 SHA-256: 805971fc1c2ecb39b4267bd9883f42cb6bc5d24933a27ce8549d3fd059bc49c0
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 and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute malicious content. The embedded URLs and link farm structure indicate an attempt to redirect users to potentially harmful sites.

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://ms-domino.eu/images/file/files/80240247097.pdf In PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/296b73f8ffb0722860dc7a23afabbe1b/galet.pdfIn PDF document text
    • http://zxsolar.com/d/files/54170646570.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160badd6d3fe97---64625074309.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ada7c022793---75395891175.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd70eed936---laxeverujolugija.pdfIn PDF document text
    • http://htwy.com/upload/file/27794212456.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/66aaa76340cb1cc6531b299bde0bfd9a/siridotusesuloneloxikunig.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/k5v17gvhi79a2gq4amcfgigr1i/didaz.pdfIn PDF document text
    • http://fedime.org/imagenes/58356297338.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e605da45722---18132512535.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/roxipixotikekamiwomexoxu.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/67e715d698fbc088659a1d2bdd28f080/kisizupewofemofemelu.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609f961355db9---75596202922.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///2021616523409.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/4cgu9jl51696bcq0qhfom8ioo7/38458794139.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160722b976f5ae---57832190988.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/92b5f5525b67c0337502648353afb7ad/5349104378.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-5-5/20210505091911627952.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/727866e6c826d7ed5420c52118723665/83762845513.pdfIn PDF document text
    • https://camping-du-lac-dijon.com/fichiers/50973060499.pdfIn PDF document text
    • http://alsumiri.net/wp-content/plugins/super-forms/uploads/php/files/796c3476306b4c0e8db13777339f92a7/nirewitukaluwemivaluk.pdfIn PDF document text
    • http://doggystylzgrooming.com/admin/photos/file/13544865852.pdfIn PDF document text
    • https://x-software.cz/data/file/ferapegadapavod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=solving+and+graphing+inequalities+worksheet+answer+keyPDF 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_off0000e0b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0B6 16204 bytes
SHA-256: 1e89ff0c2e23e7874eae70e7df1c28912dd5c8ff6e2dcddcb7f3f7152a2730eb
font_01_sfnt_off00010aba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000122d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122D1 11352 bytes
SHA-256: b778549b99feeae593c5c8d594be6575265ac9fc8afa7aa69836b7c847eb6ce6

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