Malicious PDF — malware analysis report

Static analysis result for SHA-256 17a2133dd0222cb6…

MALICIOUS

PDF

86.3 KB Created: 2021-06-28 21:18:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ddfdc07a3c431e416b5734390c65e0a6 SHA-1: d04abe1b45e115d68799d7e51d6a2c383e3b8fbe SHA-256: 17a2133dd0222cb6b6d69a064b11351e4a381c9b0676f346e2b6fa328629bd9d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites. These links likely serve as lures for phishing attacks or to distribute further malware payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/0a6df9e8a08ad5e0b8e65df33b0dc3c3/96912157915.pdf
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/e4d5605ad6df9067ea19673199657fa1/dajinobekapebodelaxupito.pdf
    • http://raczcsalad.hu/files/18403770362.pdf
    • http://guchenes.com/d/files/fagopezogaluwopetulof.pdf
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/67018476badbe33468ed20367baa82aa/9330025089.pdf
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/omkgj5cie1ublupedb12j8gg57/4141474334.pdf
    • http://amctop.com/board_data/editor_img/file/202105200805.pdf
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16082352ab80b0---96628988912.pdf
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607112b19bfec---gizikijunebukisuvesop.pdf
    • http://sochi-polyana.com/ckfinder/userfiles/files/fetixoxigisababivomesek.pdf
    • http://averon.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16098bf2ec985d---92179365079.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d505c1d403b---23420625021.pdf
    • http://smartraoptics.com/fck_filemanager_upload/file/sudajitubovupaw.pdf
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/umq9p4ao7n4o2bk2413dp0q1v1/23462490242.pdf
    • https://michelbarbot.com/upload/files/61930028228.pdf
    • http://cjandjunemillerfarm.com/clients/75830/File/40296128022.pdf
    • https://xn--hjrnskadeakademien-mtb.se/userfiles/file/puneneseroxozutefukutuji.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/456dc9d55b8853a00027678346cc3078/negogonanoraseze.pdf
    • https://termofriz.rs//files/17824781736.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/b131fu8f2bia5sfe6i7j6sve88/63905642269.pdf
    • http://goteneplast.se/files/images/file/51510248684.pdf
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609aa1cbc55e8---63371764270.pdf
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/c96fb208ef802c24970cadd297a80fc0/51253906609.pdf
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/158ucee17dm7ml7i5c43j9llco/dugofekuros.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=asymmetry+right+breast+icd+10
    • 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_off0000ee1f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE1F 16792 bytes
font_01_sfnt_off00010636.bin
7b1bf826cb87fff0ba193725ab0f3ecb0a65a1299a7f33324352af8a4068b9be
pdf-font-stream PDF embedded font (sfnt) at offset 0x10636 10956 bytes
font_02_sfnt_off00011f82.bin
e0845051c8236f9bed35f1e9057a3563fed375f48503e4f9e4fc62784e2584db
pdf-font-stream PDF embedded font (sfnt) at offset 0x11F82 17000 bytes