Malicious PDF — malware analysis report

Static analysis result for SHA-256 8747027bc23e8754…

MALICIOUS

PDF

67.7 KB Created: 2021-10-04 16:00:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 89f57eccedf6ecc2e3f022f03b851d3b SHA-1: f40139e8d4f9cccad31b630bbae8e574c2e4d9a8 SHA-256: 8747027bc23e87549f015e93e0b966300b5162c7132a7bc2594b5ecec8856b86
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, typical for phishing campaigns, and contains numerous links to external sites, many hosted on compromised CMS platforms. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to malicious content or download further payloads. No scripts were extracted, but the structure and link farm suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/2a39c8c61f8911c0a34fda6109a69888/26945685350.pdf In PDF document text
    • https://successstudio.net/userfiles/file/wolukob.pdfIn PDF document text
    • http://satcomlink.com/userData/board/file/64497542444.pdfIn PDF document text
    • http://kieryk.pl/img/userfiles/file/robikatirogenup.pdfIn PDF document text
    • http://www.parkwaytransplant.com/media_upload/upload/files/zidinineta.pdfIn PDF document text
    • http://pekingtogo.com/uploads/files/2993525498.pdfIn PDF document text
    • https://bdprescription.com/ci/userfiles/files/rototolosofo.pdfIn PDF document text
    • http://yokosohk.com/files/fckfiles/file/13758799632.pdfIn PDF document text
    • http://ibarugi.com/fckeditor/userfiles/file/zunogofepevigul.pdfIn PDF document text
    • http://ph-easycome.com/userfiles/file/ruwerinatavuvalufaxudeta.pdfIn PDF document text
    • https://ksmt.edu.np/assets/ckfinder/userfiles/files/19169827854.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/5612qjss88lqqu2qe1a4b0l994/jowamufatoviza.pdfIn PDF document text
    • https://juraganmonyet.com/contents/files/xewopavatuw.pdfIn PDF document text
    • https://vjlabor.pitscovn.com/uploads/Upload/files/baxabukigorareguginosira.pdfIn PDF document text
    • http://qhchemicalsfeed.com/upload/files/peradizolaz.pdfIn PDF document text
    • http://traktorpulling.de/ablage/userfiles/files/2304956565.pdfIn PDF document text
    • http://hosungtour.net/FileData/ckfinder/files/20211004_A46AC8AA0E45C8DC.pdfIn PDF document text
    • http://romanasulcikova.cz/userfiles/25005181535.pdfIn PDF document text
    • http://tbff-bygg.se/img/files/10942235026.pdfIn PDF document text
    • http://xinchenfast.com/upload/file/16829856692.pdfIn PDF document text
    • http://royalrep.com/userfiles/files/tibugowoguxusazebam.pdfIn PDF document text
    • https://ostrichtours.com/ckfinder/userfiles/files/58493800180.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16159a090cb6d3---muvinos.pdfIn PDF document text
    • http://rulife.ru/ckfinder/userfiles/files/24767200290.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/16145be3dc0eef---xomum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=chainless+bicycle+pdfPDF 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_off0000af6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF6A 13756 bytes
SHA-256: d9e5d7e8c3794a41f378319493457edc5f018bef4ae71a37bd3ea9b4de0910a7
font_01_sfnt_off0000d140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD140 10684 bytes
SHA-256: bd842e16113ca1fa37d9e32a65f52f4dc30b823204f8d5e0f43698736e0415f3
font_02_sfnt_off0000e971.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE971 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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