Malicious PDF — malware analysis report

Static analysis result for SHA-256 cadae447805fe256…

MALICIOUS

PDF

80.6 KB Created: 2021-09-12 18:11:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 33e9899a653ea0ebea510e46f61abbd4 SHA-1: 295d48a102f60a9646551902d8d556325bfac115 SHA-256: cadae447805fe256d7d500c7a774468f26662ca955b939b41460f50705c2ba34
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various websites, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, with ClamAV identifying it as a phishing trojan. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/128bcd13badbea4bbd765a0ab5143cab/82183897108.pdf In PDF document text
    • https://korvioinfotech.com/ckfinder/userfiles/files/64512740818.pdfIn PDF document text
    • https://mimpidia.com/contents/files/vonirepebav.pdfIn PDF document text
    • http://gabinetpro.gabinetpro.pl/kosmetyczka/krakow/files/zezasofoxevenadu.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16136772e10788---gojugajorebuxifopel.pdfIn PDF document text
    • http://lamekatus.com/uploads/ckeditor/files/2789374308.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/1613858fc68793---29583237821.pdfIn PDF document text
    • https://cuichi177.com/uploads/files/202109081918574894.pdfIn PDF document text
    • https://ashasuchikala.com/ckfinder/userfiles/files/79371859602.pdfIn PDF document text
    • http://gaia-onlus.org/userfiles/file/bupibade.pdfIn PDF document text
    • http://email-database.info/userfiles/file/23426945438.pdfIn PDF document text
    • https://cmottaviproductive.it/uploads/file/47010222950.pdfIn PDF document text
    • http://thuaphatlailongthanh.vn/upload/contentFile/minhchau/file/46157061895.pdfIn PDF document text
    • http://yuanjiangchem.com/upload/files/filirodowejo.pdfIn PDF document text
    • https://www.studioline.ie/ckfinder/userfiles/files/kopunaruvosuwetatasijo.pdfIn PDF document text
    • http://myconnect-thailand.com/image/upload/File/37151763588.pdfIn PDF document text
    • http://www.barbazan-debat.fr/ckfinder/userfiles/files/66456344560.pdfIn PDF document text
    • http://techmechengineers.com/uploads/mupatadewepasuf.pdfIn PDF document text
    • http://asbu.net/uploads/FCK_files/file/mebikidiwosirutumirigexag.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613af54d45a25---62390636588.pdfIn PDF document text
    • http://liavanhaeringen.nl/userfiles/files/ditexuwurafolagebatunoxik.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec4c3bd340---sojokabanogazuwew.pdfIn PDF document text
    • https://ahl2005.com/ckfinder/userfiles/files/fowew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=how+to+unlock+service+provider+on+iphonePDF 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_off0000d3c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C1 18108 bytes
SHA-256: 166706913f3b93c11968074c857769fd79376746a538b9693a41934156f5f430
font_01_sfnt_off000102ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B04 10784 bytes
SHA-256: 321291dead9ec17de5769a3dbb30d00b2e44ac5f06a58815e8ee575b544a0875

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