Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3b322fece2fc594…

MALICIOUS

PDF

88.7 KB Created: 2021-07-05 13:50:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: c82ca802538427c7fe38be2435c30d69 SHA-1: 91dd0612a77bd14bb65fb5f5446ab0f0eacded5b SHA-256: e3b322fece2fc59464f75eeec567dfe6cf5fb9f1f00f91b17b2fcfe17bea0c3a
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised WordPress installations. The primary purpose appears to be directing users to potentially malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/85e6aa196f8d3a825f59d1aee1d84f9f/vadesevarifusajonewam.pdf In PDF document text
    • http://zxpgw.com/userfiles/file/58917783424.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c9a57e11f43---wifufowole.pdfIn PDF document text
    • http://vogiantinhmach.com/media/ftp/file/16468460323.pdfIn PDF document text
    • http://irina-beha.com/ckfinder/userfiles/files/bigoji.pdfIn PDF document text
    • https://celebicatering.com/upload/ckfinder/files/70174986906.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/2c85549364a1a0cae09eb9e1413d6015/jiwid.pdfIn PDF document text
    • http://madveras.com/ckfinder/userfiles/files/pifuvifopuxijajuvom.pdfIn PDF document text
    • http://albatrossmrn.com/konadnew/userfiles/file/33816404197.pdfIn PDF document text
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/4c16aa6ef5c1bf0b51560fcde4e8284e/74036391185.pdfIn PDF document text
    • https://infotechb2blite.com/bot/ckfinder/uf/files/58701786816.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/38188782393.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/77968516973.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c277b9861c1---15161046014.pdfIn PDF document text
    • http://ccymgr.com/clients/a/ab/abc9983c1712fd324c9320bcfcf975a8/File/9062341839.pdfIn PDF document text
    • http://scottsdalehighbeavers1978.com/clients/80197/File/53534574599.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/sagaxubuw.pdfIn PDF document text
    • http://sonnenheizungen.ch/fckeditor/editor/images/file/31078696022.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7de6ba785---moruz.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607252147e052---33176907726.pdfIn PDF document text
    • http://www.toptehnik.si/images/pipuxusi.pdfIn PDF document text
    • http://caramelitos.sk/files/wijekalogov.pdfIn PDF document text
    • http://videoacceso.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad0ebdbe03---6199377882.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=pdf+to+text+readerPDF 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_off0000f8da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8DA 17164 bytes
SHA-256: f64f42ac13e74d1dc718675bce417b7ad5cf7ac6dd07ed03cc7e5b9c9e099b35
font_01_sfnt_off00012596.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12596 10040 bytes
SHA-256: 4b1389769989a168ad1c080203f4f953752a2f48b3af1214dde7ee4b7be9f299
font_02_sfnt_off00013c12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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