Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fcd679b8f842609…

MALICIOUS

PDF

75.0 KB Created: 2021-10-05 00:48:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 003df4aa09d735e48db1467540d9a08c SHA-1: efdd9db2c6a69e81df11302c330e88a1f2fb1b0e SHA-256: 2fcd679b8f842609175f95883f8b88634e6b8e50495f67c7e4e6015dc0f81d75
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to compromised WordPress sites 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, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://lycee-elm.info/userfiles/file/9988403856.pdf In PDF document text
    • http://liluby.com/upload/file/duzasonapobojexa.pdfIn PDF document text
    • http://gocreate.termall.pl/upload/fck/file/31791175911.pdfIn PDF document text
    • http://myesen.life/userfiles/file/40267263345.pdfIn PDF document text
    • https://giverny-bkk.com/upload/files/54939399906.pdfIn PDF document text
    • https://csmgh.net/pevron/www/img/file/83251448829.pdfIn PDF document text
    • http://asfalon.com/__files/file/xumapagomoz.pdfIn PDF document text
    • http://zatacorp.com/upload/files/84424643558.pdfIn PDF document text
    • https://nirkongrp.com/ckfinder/userfiles/files/48368250762.pdfIn PDF document text
    • http://logenamerica.com/userfiles/file/karadapukoloselajomit.pdfIn PDF document text
    • http://website-design-company.in/dev3/damodar/ckfinder/core/connector/php/userfiles/files/nitepudejaworuw.pdfIn PDF document text
    • http://tjsyjdq.com/v15/Upload/file/2021925131153782.pdfIn PDF document text
    • http://gift-founder.com/archive/upload/files/pezazidezorobupafumiziv.pdfIn PDF document text
    • http://kovacsoltvaskerites.hu/images/file/80420632947.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/161583b7bc8862---ranexurukukivorerewozo.pdfIn PDF document text
    • https://intrastorg.com/userfiles/file/33821088548.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16137873b3e604---51834319760.pdfIn PDF document text
    • http://keramann.ru/uploads/files/93813353648.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ecd26d3399---bamipuvekazinapuxivewew.pdfIn PDF document text
    • http://www.eatvirukai.lt/uploads/files/jegudofijat.pdfIn PDF document text
    • https://www.jancsoalapitvany.hu/ckfinder/userfiles/files/momidinewuf.pdfIn PDF document text
    • https://ruiguoex.com/upfile/files/2021/09/21/telemutuxerudijifowejef.pdfIn PDF document text
    • http://autoservizimensi.it/images/fck/file/93788652745.pdfIn PDF document text
    • http://salsainkonstanz.de/media/files/fajifekifelixelaje.pdfIn PDF document text
    • http://china-engine.net/ckfinder/userfiles/files/82240063240.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=internal+heart+anatomy+labeledPDF 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_off0000c388.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC388 10456 bytes
SHA-256: a55661fde6aa5feb8e56de8bdc5a1022ec25d1e20222bfd78aaa7764b048fefb
font_01_sfnt_off0000db10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB10 17040 bytes
SHA-256: 0c04e2aaa0bd6f1da104ba6a62e079273a6c4f83710df885f6bafc89366299b6
font_02_sfnt_off00010646.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10646 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1