Malicious PDF — malware analysis report

Static analysis result for SHA-256 668da0cf8ed4ed5b…

MALICIOUS

PDF

98.5 KB Created: 2021-07-18 01:18:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: c6539a4b837dfa2cddcd4209cfb34b29 SHA-1: 302ae5b175353878c69679fe79c5512a464cea20 SHA-256: 668da0cf8ed4ed5b5ac47a8c333a785e8c6fd961d7f571e841f062fe0f0d41f8
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous compromised CMS upload storage locations, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, classifying it as a phishing trojan. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://namjapizza.com/app/webroot/files/galewojemurinoxokedaki.pdf In PDF document text
    • https://all-stage-meditation.tw/uploads/files/60dc287819868.pdfIn PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/0e0eb94b8bb09367115e0638592c3c0a/jabipifizogakevasi.pdfIn PDF document text
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/1c601a41aed70475d585b8b2bba18309/lupetigenuzedilotekip.pdfIn PDF document text
    • http://szymonadamczyk.pl/uploads/fck/file/84066689217.pdfIn PDF document text
    • http://ya-ke.cn/admin/upload/7202816243.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c5cb1dc0ffb---20219914759.pdfIn PDF document text
    • http://c2r-auto.com/uploadfiles/file/2021051910133373499.pdfIn PDF document text
    • https://singaporeroadshow.com/wp-content/plugins/super-forms/uploads/php/files/6a7f673614011794da156b733e2a70b9/46108979846.pdfIn PDF document text
    • https://arrayamed.com/userfiles/file/42216998682.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/740d3f58fc36d6ad61468988124d6b95/kukabinunedimudegi.pdfIn PDF document text
    • http://firegallery.ru/img/upload/kipalubaxaranom.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bec97f7e680---tugeputuzozis.pdfIn PDF document text
    • http://design-klasse.de/ckfinder/userfiles/files/nifofev.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c8cde86e032---1500768194.pdfIn PDF document text
    • http://mynigaoe.com/upload/file/20210515013604.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce46cc43c7d---pepimox.pdfIn PDF document text
    • http://web-news.eu/www/pkpar/userfiles/file/84235762287.pdfIn PDF document text
    • http://www.cascinasorigherio.it/wp-content/plugins/formcraft/file-upload/server/content/files/16075cdacadef9---didikokusuzabavav.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16071e67600b6d---72965752287.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=word+whizzle+common+coldPDF link annotation
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/31bc8130df01ffea1882aa0e9132f04d/difemoranazine.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_off0001210b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1210B 16904 bytes
SHA-256: 8db4e68cca8ed235129fe07e5894516113717441b383ea8db9ca3b2e998cf5cf
font_01_sfnt_off00014c63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001647a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1647A 10344 bytes
SHA-256: 414f26a4f1588de8da3868549508d8543ceccd80c5cac362f3ebb6a87784fcbe

Open this report in the interactive analyzer, or submit your own file for analysis.