Malicious PDF — malware analysis report

Static analysis result for SHA-256 346b08cf1ec3c54d…

MALICIOUS

PDF

78.7 KB Created: 2021-03-25 06:55:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 9e9c138b46e6f1dc080a598962e9fc0c SHA-1: 1691eadf7bb0378e0d406646a6a8910c22653144 SHA-256: 346b08cf1ec3c54deb06cddac7da7b6c1ee3c75481dd201ab0a9ff1b8cde44e7
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=ts+pgecet+2016+allotment+order PDF link annotation
    • http://mafujewulig.66ghz.com/reporting_bullying_at_work_uk.pdfIn PDF document text
    • http://olymptrade.buzz/48843170975dy1vt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475854/normal_6056f3193fdaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402250/normal_600df786a95eb.pdfIn PDF document text
    • http://devlp.club/faithful_pvp_texture_pack_64x64o11fq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470389/normal_604fd99158e21.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450723/normal_600e23091679a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_6009ea3e2d6ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421764/normal_5fe4c0b8ca915.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365652/normal_6059bed8eeb67.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495254/normal_5ff7f80706c30.pdfIn PDF document text
    • https://cdn.sqhk.co/vomemubevu/sidnajh/pogotazawibifana.pdfIn PDF document text
    • http://testvvd.xyz/dd_3.5_sneak_attack_prestige_classesbthgl.pdfIn PDF document text
    • https://cdn.sqhk.co/kulukopupiw/gPgiidw/accreta_increta_percreta.pdfIn PDF document text
    • http://lngcliente.com/nusufozamaramagedqs202.pdfIn PDF document text
    • http://drilltech.info/beamer_presentation_template_freeu718h.pdfIn PDF document text
    • https://cdn.sqhk.co/votezevon/fgeLuij/rozarijavuvikepet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fodiwivovekuvut.epizy.com/97907339484.pdfIn PDF document text
    • http://nemusif.rf.gd/mupivubarimujelu.pdfIn PDF document text
    • https://s3.amazonaws.com/fekife/20788014137.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/40265537663.pdfIn PDF document text
    • http://faduzidivatakid.epizy.com/bachelor_degree_of_information_technology.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/31311817845.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/lost_camera_icon_android.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF410 5820 bytes
SHA-256: 9341df2960a1df455ee80580fc1e99d3134791621566f01310d5e4928d34c3f2
font_01_sfnt_off000107d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D2 11072 bytes
SHA-256: 4eeddfd2294e1df236eac332dda9d94ff5eb642c85ec18c5745b31ca61ff8eb1

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