Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a0fdcf697b8576e…

MALICIOUS

PDF

72.1 KB Created: 2021-09-04 11:49:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5f340659734d6fa45ae6c8cd9aeefc9a SHA-1: 94624b531ba61e3964b010a0b36db40674e1bc52 SHA-256: 2a0fdcf697b8576e815b883f5f9cac52b517f80d47360856b0e6ca644aa89419
196 Risk Score

Malware Insights

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

The PDF file contains numerous links, many of which point to compromised WordPress installations and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://inspiredindianfoundation.org/uploads/99153089635.pdf In PDF document text
    • http://harveyfamily4016.com/clients/5/51/51a16c7d09a65bdad6d3cd8ef7da6b4e/File/96115658913.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4fb740026---66086796397.pdfIn PDF document text
    • https://gs-hemeringen.de/ablage/userfiles/files/kegibumunixizow.pdfIn PDF document text
    • http://korealabels.com/ckfinder/userfiles/files/wupebifojajexomikepuwop.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e98d799bf---49197732490.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/5092be741b466618045437a7ee661e9b/bedikew.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160763cdbe5d6e---jigonisovitif.pdfIn PDF document text
    • https://thuaphatlaihoanghuy.com/uploads/files/wilajugofaluvewexoz.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a21fc0a3e36---zakasozikigovibo.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/kmeacvb91ig75b42k32o6d9fb0/20472485755.pdfIn PDF document text
    • http://www.alfapilates.pl/upload/file/vujozotajuba.pdfIn PDF document text
    • https://www.autodepotperformancegroup.ca/wp-content/plugins/super-forms/uploads/php/files/76mrdk8916h7q1jr3spievl2hi/7657564922.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/p8rro9rbh1vhgcklcb383hkoe8/85381277247.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa595593c8b---47724527102.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160d789b8ee164---xujonizar.pdfIn PDF document text
    • https://www.truegridpaver.com/wp-content/plugins/super-forms/uploads/php/files/20788e2d8e134b539561b148708a505f/xomomobe.pdfIn PDF document text
    • https://namdolove.com/FileData/ckfinder/files/20210720_19F94D047560A725.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092d5eeaece9---73321753769.pdfIn PDF document text
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/1814511371.pdfIn PDF document text
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/160868657314a2---83200507151.pdfIn PDF document text
    • http://pcccphucvinh.com/upload/files/33649910955.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/644771fdf5024fd62fa54d6ab361d9dc/vixepusazawobutipifidox.pdfIn PDF document text
    • http://sdes.in/uploads/59705688643.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=gcta+law+pdf+downloadPDF 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_off0000baeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d2fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2FD 15876 bytes
SHA-256: 672005da0135f9fee985f565e9e27ee62cd27c7397e8dc871e180a3d2ccb4acc
font_02_sfnt_off0000fb93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB93 10244 bytes
SHA-256: 72f8156437cc0b476d201f777536861f3375727ee337a9e47bcbe04b2c627173

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