Malicious PDF — malware analysis report

Static analysis result for SHA-256 76afa35655a7bb58…

MALICIOUS

PDF

81.8 KB Created: 2021-09-20 00:53:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d12ef9353ddfb187318e4ee7742ecb4c SHA-1: 08f2b519176aee8b8fa988ac0c41db42f9765752 SHA-256: 76afa35655a7bb58d571cf4119c4ef151b001d9daf3351522be8c6dd57770f28
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs that point to a link farm hosted on disposable domains, a common tactic for phishing or distributing further malware. The 'utm_term' parameter in one of the URLs suggests a lure related to software downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://irlanc.ru/uplcv?utm_term=procreate+download+free+android PDF link annotation
    • https://mimpi1pusat.com/contents/files/baponarumixufepumafuj.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161409ddf7dba0---kujiwutunavajegadow.pdfIn PDF document text
    • http://phongkhamthienhoa.org/images/files/99936025289.pdfIn PDF document text
    • https://lomasdelaweb.com/userfiles/2008.09/file/vagetixisomurub.pdfIn PDF document text
    • http://dental-forum.ru/userfiles/file/mubitix.pdfIn PDF document text
    • https://tw-itemaos.com/ckfinder/userfiles/files/judarujaruno.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/5c6436243a1a166f72cffd4682e72ae5/86800067949.pdfIn PDF document text
    • https://eco-translation.ca/upload/editor/file/43484405361.pdfIn PDF document text
    • http://indianspringhomes.net/userfiles/files/radobofuf.pdfIn PDF document text
    • http://kvbm.org/pds/userfiles/files/towipusogatusenedimux.pdfIn PDF document text
    • http://szamosiszerviz.hu/feltoltott/files/83724402055.pdfIn PDF document text
    • http://korsorlampang.net/user_img/files/vogowojulasosoj.pdfIn PDF document text
    • http://foxadv.net/file/85305522858.pdfIn PDF document text
    • https://susta.vn/userfiles/file/74007208804.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/76735536355.pdfIn PDF document text
    • http://dieta-plus.pl/userfiles/file/bufil.pdfIn PDF document text
    • https://sabresources.com/FCKuploads/file/83912019188.pdfIn PDF document text
    • http://ahknchem.com/upload/files/bixalabupakafefuvudadadem.pdfIn PDF document text
    • https://doosradashak.in/ci/userfiles/files/votuzu.pdfIn PDF document text
    • http://pivotal-technologies.com/userfiles/file/86230952503.pdfIn PDF document text
    • https://portoggitter.no/content/files/userfiles/file///xirid.pdfIn PDF document text
    • https://chatham-ebenezer.ckdomain.com/uploads/userfiles/files/33061450209.pdfIn PDF document text
    • http://bytip.net/filespath/files/20210903064556.pdfIn PDF document text
    • https://sanaspinler.net/calisma2/files/uploads/xewuti.pdfIn PDF document text
    • https://blnk.eu/userfiles/files/gebawosirudanivuze.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_off0000d9b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9B7 10388 bytes
SHA-256: 8fa4cacf401643dd6c44d97eb7656cc8cd42fd9a06f86fba956b4a960f06256a
font_01_sfnt_off0000f157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF157 18496 bytes
SHA-256: 359e1c8f5091370c9aded79cca59d2bc5d46fe18f248f147116a15e88832aa62
font_02_sfnt_off0001216c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1216C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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