Malicious PDF — malware analysis report

Static analysis result for SHA-256 7742c0732e31b704…

MALICIOUS

PDF

76.4 KB Created: 2021-03-16 04:05:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 113dca8a07a7e7fe76cdffa04364837c SHA-1: 8d777f62a98ec13b9f815345d715b6954fcae646 SHA-256: 7742c0732e31b704b297fe32528b50022d1be668a2b01d6ff8a1a0758e9dc44d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ClamAV and an ML classifier, and it exhibits characteristics of a PDF link farm, containing numerous external URLs. The document body, though heavily obfuscated, suggests a lure related to 'free templates for invitations wedding'. The presence of many external links, including one to 'shtampshop.ru', indicates a potential attempt to manipulate search engine results or redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jottigo.ru/123?utm_term=free+templates+for+invitations+wedding PDF link annotation
    • http://shtampshop.ru/therapeutic_foster_care_asheville_ncckavp.pdfIn PDF document text
    • http://tumuduwaju.mypressonline.com/malokulekigumitirunina.pdfIn PDF document text
    • http://biolinkus.me/homebrewing_beer_guide6kl9t.pdfIn PDF document text
    • http://maleev.online/feromividuxopigr7j0c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wugerubuvugox.myartsonline.com/fotopisixenefifepitas.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/archeology_magazine.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/wikexarodujuri.pdfIn PDF document text
    • https://s3.amazonaws.com/patilawasu/cimb_group_annual_report_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/life_fitness_9500hr_elliptical_cross_trainer.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/66655419313.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/83666475126.pdfIn PDF document text
    • https://s3.amazonaws.com/dekogamik/hungry_shark_apk_mod_5._7._0.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/garfield_2004_movie_tamil_dubbed.pdfIn PDF document text
    • https://d3dd75b0-514a-4dbf-a1f7-973a5b421fb1.filesusr.com/ugd/5b46ec_72b5fb048cbc4ad3b7df614ca4e65bc7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wupiwupiwot/what_company_makes_evcon_furnaces.pdfIn PDF document text
    • https://9e1b5e4e-b4ab-405b-8fdf-b3b6d7b19c28.filesusr.com/ugd/94ea38_4e05d7c8b33b4dc2a2db38b541f239c7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sigobija/liluwebukorixid.pdfIn PDF document text
    • https://s3.amazonaws.com/nojemi/full_size_bed_sheets_target.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://scripts.sil.org/OFLIn PDF document text

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA4 5468 bytes
SHA-256: 3c064494ef7708f23b9df1935de2249a9d1d8cc5f773e1ddc68dec8c3747c210
font_01_sfnt_off0000fe3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE3D 11284 bytes
SHA-256: df293d9b03b6c8dde0c0127cd46e9056402c1ccd8575b451ed65b4718938dbb9

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