Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a8e8d0090e4e119…

MALICIOUS

PDF

92.7 KB Created: 2021-09-08 11:56:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 65b943f3a0c4f36ae13a69da80a2ab76 SHA-1: b4a3c939c3a5666f2c0b8eb80cb0d3b5d6125d6c SHA-256: 2a8e8d0090e4e1197fca52aae97d8a3f7312159d3a4eedc8a9378b15ed184fe1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress upload directories or are part of a link farm hosted on disposable domains. These elements suggest the document is designed to lure users into clicking links that likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://oniceh.ru/uplcv?utm_term=inspirational+graduation+speech+pdf PDF link annotation
    • http://rideabikenews.com/user_img/files/46159623353.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d8cc5c6f2---forojatu.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16072ce459e2f2---niwopujedasudav.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b8d1159f1ed---88134152210.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c00e8c05c---12496184287.pdfIn PDF document text
    • http://sbox-technology.com/upload/datoteke/32648435319.pdfIn PDF document text
    • http://akcihlar.cz/userfiles/file/tutiribujijo.pdfIn PDF document text
    • http://bettynblue.com/upload/fck_img/20210525/file/sigifomu.pdfIn PDF document text
    • http://cn-polylysine.com/d/files/30524896294.pdfIn PDF document text
    • http://pitin-akutsu.com/js/upload/files/dufasexe.pdfIn PDF document text
    • http://svaz-podnikani.cz/files/file/sigoxegesejatepul.pdfIn PDF document text
    • https://europartner2.pl/uploads/bezububozebilu.pdfIn PDF document text
    • http://famillespourstarlight.com/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/63668696050.pdfIn PDF document text
    • http://thibangoto.com/app/webroot/uploads/files/nufabamuvuvugum.pdfIn PDF document text
    • https://intervalhousehamilton.org/ckfinder/userfiles/files/patumulizawazux.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/7b19aa3466cec86c9d4187a055808d6c/15696892243.pdfIn PDF document text
    • http://puntolinea.org/userfiles/files/71937071855.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160dabcd77370b---wopotosopogu.pdfIn PDF document text
    • https://cowichanmusicfestival.com/userfiles/file/34781283996.pdfIn PDF document text
    • http://centralwestwoodclassof1983.com/clients/c/cd/cd4b3c89dd1500142a52f05b9125c350/File/2060915174.pdfIn PDF document text
    • https://tasivn.com/upload/ck/files/52207879140.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608417dbec48c---65801406748.pdfIn PDF document text
    • https://faktxeber.com/resimler/files/rapevunusijew.pdfIn PDF document text
    • http://haai.org/upload/file/17302386249.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001045e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045E 18480 bytes
SHA-256: e90af348140a772c943f47379a36f23d46b2973a5cbba7d8b28db66b351b0626
font_01_sfnt_off0001341c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1341C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014c33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C33 10948 bytes
SHA-256: e359ec19dd91763bc2001f993d252ee6d6df3c2e12a0f1b13e20c1cf8268c000

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