Malicious PDF — malware analysis report

Static analysis result for SHA-256 265fbf5759624673…

MALICIOUS

PDF

81.1 KB Created: 2021-09-14 05:05:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: f792f178bf549d099ecf94dc70e5e4e9 SHA-1: 5d04d2caa7d9f10d97d319f53081080b7ed7bc92 SHA-256: 265fbf5759624673cf3188079183cdb203f3ce57e7ffbda368606c9a6f5f558e
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with numerous embedded URLs pointing to potentially malicious content. The 'SE_SECRET_RECOVERY_LURE' heuristic suggests the document's content, though truncated in the provided evidence, likely attempts to trick users into revealing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://wastran.ru/uplcv?utm_term=beyblade+app+scan PDF link annotation
    • http://soojuspilt.ee/files/file/82525281061.pdfIn PDF document text
    • http://kammed.com/userfiles/file/22047840930.pdfIn PDF document text
    • http://ats-dz.com/userfiles/file/tumepalaxemeporupopis.pdfIn PDF document text
    • https://argumentua.com/i/file/82427561685.pdfIn PDF document text
    • https://htlexpress.com/ckfinder/userfiles/files/nidowogagunevaxoju.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/12370807240.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16132da991d323---72086404790.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/zowelejag.pdfIn PDF document text
    • https://ever-progress.dacola.com/upload/files/dewaladumujunebamepixexa.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/161308809f0bf8---varabalomabivo.pdfIn PDF document text
    • http://perlawarmii.pl/userfiles/file/likufunufizinusuritaxer.pdfIn PDF document text
    • http://mwbright.com/upload_fck/file/2021-9-1/20210901150224761464.pdfIn PDF document text
    • http://bidwoodmachine.com/d/files/51896740668.pdfIn PDF document text
    • http://hcstonetw.com/uploads/files/202109131904095167.pdfIn PDF document text
    • http://vietkinggroup.com/uploads/userfiles/file/92089151026.pdfIn PDF document text
    • https://rijst.nu/userfiles/file/xozugavenomumumivimi.pdfIn PDF document text
    • http://maksimetall.ru/files/zifedamokaxetejumewox.pdfIn PDF document text
    • https://mimpishio2bet.net/contents/files/45158614146.pdfIn PDF document text
    • http://www.videobezopasnost.ru/ckfinder/userfiles/files/kasoxevomumotogu.pdfIn PDF document text
    • http://hataylezzeti.com/resimler/files/15912290403.pdfIn PDF document text
    • http://jsdarvin.com/files/vulapa.pdfIn PDF document text
    • https://gospel-streams.com/asset/ckfinder/userfiles/files/rolexizufa.pdfIn PDF document text
    • https://mosallaesf.ir/uploads/ck/files/zazivudiranus.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_off0000d725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD725 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3C 10404 bytes
SHA-256: 9cb2388074b5e8b81f1050cd464c718ee4213255e7befee391e99d05cfb47fb2
font_02_sfnt_off000106b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B9 18356 bytes
SHA-256: ee4fc8dbb9803267e805cf5d29c7e618bd0a97c06603cb38b37dae9cc7e9ae6b

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