Malicious PDF — malware analysis report

Static analysis result for SHA-256 bba5ec3db0a6b590…

MALICIOUS

PDF

75.5 KB Created: 2021-09-07 07:04:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7ffb0b1652f93fcb302828850a4b07ea SHA-1: f9fb2ebb3c550f9b17b6bec11c693aeaa2c33f2e SHA-256: bba5ec3db0a6b590d9da31ef859c904a1f0efc53659023cebeded5ffb87d0f47
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains numerous links pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The presence of a link farm on disposable hosting further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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 https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/16117417128692---sesujutuwipilesesisaba.pdf In PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/25nasakkmdvea34kn9l9u18ak7/wozamedodijodafekijuwej.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/72240655609.pdfIn PDF document text
    • http://studiorapizza.it/userfiles/files/69085897166.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16118ea4407561---fekalilox.pdfIn PDF document text
    • https://mimpishio1.com/contents//files/tologirovabijoxirekitig.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/ad90f6ace9441d9216b3cd54895cd6a4/gozov.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609090f0bf029---xogosafevarobekipuje.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/a270f8c8fa8b42abdce00dc05347cdbc/rikafitaxegigedudogam.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/900f48c31b3b2e1f07be237e0fe12be8/24806754076.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/15540492306.pdfIn PDF document text
    • http://studioindelicato.com/userfiles/files/83705019272.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/16113c7a944b9e---43048257767.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/161304fe32bd6b---78923369681.pdfIn PDF document text
    • http://hoangnamjsc.com/upload/files/42263388264.pdfIn PDF document text
    • http://chrisdepanneservices.com/Sites/cds/files/36457973630.pdfIn PDF document text
    • https://sbmhavacilik.com/userfiles/file/gupebaxosatuno.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/e4f4001e3c61df14e583ae2b59f498f1/rugukuvixu.pdfIn PDF document text
    • http://lottfamilyreunion.com/clients/878857/File/gisukujerabiwavewuwure.pdfIn PDF document text
    • https://10glazsikeyrosa.ru/file/12495240710.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/40118523915.pdfIn PDF document text
    • http://liebherr-tr.com/userfiles/file/55795131309.pdfIn PDF document text
    • https://washlounge.in/ckfinder/userfiles/files/rotum.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085e83f899f9---zekamesuxut.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/n51qpf52qh1rj96em0afh2vp2h/3570799922.pdfIn PDF document text
    • http://fohow77.ru/upload/file/xetojizij.pdfIn PDF document text
    • http://ulleungroadtour.com/FileData/ckfinder/files/20210828_34AD0F5C58D286AB.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=healer%27s+handbook+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_off0000c566.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC566 16480 bytes
SHA-256: 35955bcd1bcaf7fcd8127e16b02eeff7ffc021efb0225d1549289c71b02355ed
font_01_sfnt_off0000f02c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF02C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10843 10660 bytes
SHA-256: 1b6c5e7de9aab1b1f99b586970d8b4eb9c5c3cb7e9664ee1dc6bae5a5a923587