Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3eb45c9370a2c5c…

MALICIOUS

PDF

81.4 KB Created: 2021-09-12 01:08:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 368a22ba38f0999e645acef804164e13 SHA-1: ae6295155add9165aa6d39f3f70396667c62238c SHA-256: e3eb45c9370a2c5c0323a61833b03c842af8d24fe5f4b8501cdbd65d512b7ab8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to various domains, many of which appear to be part of a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing and malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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 http://nicolalazzarotto.com/userfiles/files/natokirezadevijojamaf.pdf In PDF document text
    • http://lagrupacio.cat/file/70869860978.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fa8958daf7---soxotijiwebifazukake.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131c5136b7e2---redejetenisobupu.pdfIn PDF document text
    • http://rem-stroymont.ru/img/file/naribepaw.pdfIn PDF document text
    • http://feminella.ro/upload/fck/76113548938.pdfIn PDF document text
    • http://immobiliareborghi.com/userfiles/files/jinugesamolapu.pdfIn PDF document text
    • http://intertribo.sk/files/laxulovomowesokag.pdfIn PDF document text
    • http://radiosalsa.fr/php/rs/filesupload/file/63831486213.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/46762149212.pdfIn PDF document text
    • http://nuk-amro.de/userfiles/file/mukexesufuvixamo.pdfIn PDF document text
    • http://infas.cz/images/wiswig/file/29921562546.pdfIn PDF document text
    • https://goooinggroup.com/userfiles/files/20210910_145905.pdfIn PDF document text
    • http://321eastern-thailand.com/userfiles/files/rixovuk.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/sumoraxezivogazijadutuka.pdfIn PDF document text
    • https://ecoolteh.eu/galeria/file/fududivu.pdfIn PDF document text
    • https://www.padanguparduotuve.lt/ckfinder/userfiles/files/vufexutusobekideru.pdfIn PDF document text
    • http://registermycompany.in/admin/userfiles/file/93044952973.pdfIn PDF document text
    • http://cuacuontoanthang.com/media/file/tepuzobepejuwagu.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613d22f030833---91808670687.pdfIn PDF document text
    • https://dodatnojamstvo.com/userfiles/file/58527994937.pdfIn PDF document text
    • https://clove7.com/userfiles/file/galakuduv.pdfIn PDF document text
    • http://krishikhabar.net/assets/ckfinder/core/connector/php/uploads/files/28920012417.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe6446bcf8---sevaduxapu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=apk+crash+bandicoot+1PDF 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_off0000d662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD662 10696 bytes
SHA-256: 54e910bfb4900e727933963a4502b988a18c75918c36701779321be8ca623ddc
font_01_sfnt_off0000eebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000106d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106D0 19028 bytes
SHA-256: c94d681859998d2bc6793236d8721e629e1004d5e6885f2d6031b133c10c918a