Malicious PDF — malware analysis report

Static analysis result for SHA-256 0612712000eeca06…

MALICIOUS

PDF

75.1 KB Created: 2021-02-18 07:42:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: c5cede87fece64155f16846c3ba3c0e6 SHA-1: c14023437481c452e58c206d33e3b869cec97816 SHA-256: 0612712000eeca06a3461e271ac1192b418c32ca7b2979995b7a0cecc7a21e7e
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many of which are SEO-optimized and point to potentially malicious content, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. One prominent URL, 'https://leonvi.ru/123?utm_term=how+to+login+to+motorola+sbg6580', is presented in the document body, suggesting a lure to a phishing or malware site. The ML classifier and ClamAV detection strongly indicate malicious intent.

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://leonvi.ru/123?utm_term=how+to+login+to+motorola+sbg6580 PDF link annotation
    • https://rowevopa.weebly.com/uploads/1/3/1/8/131872281/87691.pdfIn PDF document text
    • https://pulimogub.weebly.com/uploads/1/3/4/3/134312020/vofukexi.pdfIn PDF document text
    • https://puriruwuz.weebly.com/uploads/1/3/5/3/135395363/6998844.pdfIn PDF document text
    • https://muxasikij.weebly.com/uploads/1/3/1/8/131872285/10a0a7c93d45.pdfIn PDF document text
    • https://lawagupavuraxap.weebly.com/uploads/1/3/4/6/134616311/burogop-duvuk-vuzapititukuguf.pdfIn PDF document text
    • http://lnstagramverifiedsbadgeforms.com/brucellosis_treatmenth99v3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529024/normal_602c36ea7b524.pdfIn PDF document text
    • https://namoxatiki.weebly.com/uploads/1/3/4/4/134477177/motuxovog.pdfIn PDF document text
    • https://womomoko.weebly.com/uploads/1/3/4/8/134848640/3efe9df.pdfIn PDF document text
    • https://vimasideb.weebly.com/uploads/1/3/3/9/133997972/4231690.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/negonanopix/rational_irrational_numbers_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/latest_bollywood_award_show.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/investigator_brochure_ich_guidelines.pdfIn PDF document text
    • http://ruriwujuvuwa.epizy.com/tasip.pdfIn PDF document text
    • http://merizipu.rf.gd/27165909122.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/favupejezufunafef.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 8

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_off0000e469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE469 5812 bytes
SHA-256: 1a6c5feea7803441a925038ca6d64a580f989eb6ea7479054a0ce52071936d4f
font_01_sfnt_off0000f82f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82F 11616 bytes
SHA-256: 5b6414de8eaa4b867f28eb57d46a39882d8aa8f7fc59de7257bd60d6befecc0f

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