Malicious PDF — malware analysis report

Static analysis result for SHA-256 2672cf3129957a8a…

MALICIOUS

PDF

85.5 KB Created: 2021-09-16 18:17:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 8400df69c79cb7162d3ab712e309b320 SHA-1: 00974e475c303a1b5385648771d2f53d8e563f81 SHA-256: 2672cf3129957a8a2120e1ee4297f8448cfe6f7f876acb2b111b3516fc3131f3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised websites and link farms, suggesting an attempt to redirect users to malicious content. The presence of a 'download' lure and ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates a phishing or malware distribution attempt. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with common phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://nestsearch.in/admin/uploads/file/jigewurunugobalijitopab.pdf In PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/62451773511.pdfIn PDF document text
    • https://apz-arte.com/ckfinder/userfiles/files/67566294349.pdfIn PDF document text
    • http://www.ssc-ras.ru/ckfinder/userfiles/files/62677874521.pdfIn PDF document text
    • http://restauraceeverest.cz/userfiles/file/xixil.pdfIn PDF document text
    • http://studiofranzoni.eu/userfiles/files/vagixosawusujozewefunu.pdfIn PDF document text
    • http://xn--80aafbjcazdrhzgiddbbcsg4l.xn--p1ai/pict/file/33422696046.pdfIn PDF document text
    • https://rmduncanrealty.com/userfiles/files/fawamigeletukipuko.pdfIn PDF document text
    • http://www.plain-pied.com/editeur/ckfinder/userfiles/files/12097575792.pdfIn PDF document text
    • http://immobilieninvestors.org/userfiles/file/73430136822.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ae6802f0f3---6065315112.pdfIn PDF document text
    • https://turbooto.vn/upload/files/pipadavebi.pdfIn PDF document text
    • http://decorstore.eu/upload/file/rifutezito.pdfIn PDF document text
    • https://rtquery.reitoken.org/Coaching123/images/files/97475663186.pdfIn PDF document text
    • https://procogs.com/FCKeditor/file/30266488847.pdfIn PDF document text
    • https://bliznacite.com/files/84289455627.pdfIn PDF document text
    • http://sport-zavora.cz/data/file/41125446144.pdfIn PDF document text
    • http://cobmedia.hu/include/sojipojebu.pdfIn PDF document text
    • http://cuanhuaabshanquoc.vn/files/57219530232.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142534217d5c---gopibenuzunagilojititivus.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1613f39df72304---88151247594.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/0b0d67a4707e44188fb96980a096418f/dotutejazijexosap.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613d56261d619---sotek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=download+bloody+roar+2+apkPDF 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_off0000e5a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fdb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB9 19620 bytes
SHA-256: 11e63da3815fece33940905170f34315d6a0d4fac9401d3f74cea048e0b3a88b
font_02_sfnt_off00013138.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13138 10448 bytes
SHA-256: 87e7b9df8bad67fa7e277cf359b01622b4353dae8b25ab2422f9f1f9e3731fe4

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