Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e66e1c8f95f9166…

MALICIOUS

PDF

103.6 KB Created: 2021-09-18 23:51:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 6f7fdfc16005101d283f0efc689aa81a SHA-1: 1d65f4d64f83925313913e21bd74c48c30183aa7 SHA-256: 9e66e1c8f95f91663042962c07bdad7b0032fa79b3cf256a16a3529f67f5bc61
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and a large number of external URIs, many of which point to compromised WordPress sites. These links appear to be part of a link farm designed to redirect users to malicious content, likely for phishing or malware distribution. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://pistant.ru/uplcv?utm_term=battery+diagnostic+android PDF link annotation
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/30cb64b2ed34b7971c66a40157810731/lolaranupijuk.pdfIn PDF document text
    • https://indobaliart.com/sitefiles/file/54353211898.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613d18c0d7194---8470100964.pdfIn PDF document text
    • http://phoiinnhiet.com/images/uploads/files/58578084444.pdfIn PDF document text
    • http://fabriquetextil.com/js/new/fckeditor/userfiles/file/mitadojavunasif.pdfIn PDF document text
    • https://presentkompaniet.com/img/content/file/21878416182.pdfIn PDF document text
    • http://pulsarvn.com/media/ftp/file/kitozenuxefamodolabozal.pdfIn PDF document text
    • https://dortmundpools.com/contents/files/kawumilavulawafel.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613d63f1ae91f---puwelifawogawatav.pdfIn PDF document text
    • https://yodishit.com/uploads/userfiles/file/30433580043.pdfIn PDF document text
    • https://ms02bet.net/contents/files/18664659406.pdfIn PDF document text
    • https://gosselindesign.com/images/from_fckeditor/fichiers/tibonuxovafosexuxogo.pdfIn PDF document text
    • http://vietdubai.com/userfiles/file/kugarafekagixeki.pdfIn PDF document text
    • https://iphone-odklep.si/vsebina/52250743708.pdfIn PDF document text
    • http://vistobrasil.net/uploads/file/nejafotit.pdfIn PDF document text
    • http://www.deep2001.com/images/library/File/10562729427.pdfIn PDF document text
    • https://www.informacion-indoorclub.com/boletines/img/file/17875430068.pdfIn PDF document text
    • http://azizolace.cz/images/file/34355898714.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/83675811365.pdfIn PDF document text
    • http://jump360.co/upload/files/20210908194818.pdfIn PDF document text
    • http://santehnika34.ru/images/file/dugerojizej.pdfIn PDF document text
    • https://yuvasarkar.org/userfiles/file/85632471090.pdfIn PDF document text
    • https://alasclub.gr/neuro/ckfinder/userfiles/files/bekudirafumuzanozatel.pdfIn PDF document text
    • http://cathugo-catamarans.de/res/wysiwyg/file/43525469404.pdfIn PDF document text
    • https://grandhotelbulgaria.com/userfiles/file/38416967632.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_off00012f7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F7C 18368 bytes
SHA-256: f01f8a44bad070f3c01d385aa724f5ec4c55d51f86b511cf1d2c36de4d90fef3
font_01_sfnt_off00015fcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FCC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000177e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177E3 10664 bytes
SHA-256: 050762f3abfd5b68a4306c02d391b56e5979610c60e842062c2dbd7336f1c507

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