Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5e7ac3b19695e3d…

MALICIOUS

PDF

85.7 KB Created: 2021-04-04 00:13:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2485aa17f226c0d029d81fd0fa0794ae SHA-1: a2822d2fe969b35dced6582343821ba4e46b33da SHA-256: b5e7ac3b19695e3d72ff0284a990e2718c6ba8693479ec8f65154032f2aa0bf1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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. Specific URLs and indicators for this sample are listed in the indicators section.

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 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://jumiwimov.ru/award?keyword=amish+tripathi+books+in+malayalam+pdf PDF link annotation
    • https://cdn.sqhk.co/rizitewav/NJPibYK/namuj.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/96546793818.pdfIn PDF document text
    • http://biomaniix.website/fokusoxemowuwobutasidari2kha1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419630/normal_605b7da1b5af3.pdfIn PDF document text
    • http://wujasonuvilo.mywebcommunity.org/86027800023.pdfIn PDF document text
    • https://cdn.sqhk.co/sojowidaz/Bgeldid/jiffy_lube_portland_tx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496380/normal_605c23d1f401f.pdfIn PDF document text
    • http://revershjtb.site/cinema_4d_r13_plugins_freeuamm4.pdfIn PDF document text
    • http://disozire.mygamesonline.org/81245916273.pdfIn PDF document text
    • https://cdn.sqhk.co/madumubo/dT5ggs2/fowezevabekun.pdfIn PDF document text
    • https://cdn.sqhk.co/lewuravasu/2hbzPa3/47828235431.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451949/normal_606402afdf4d1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://dobemeze.rf.gd/formulas_volumenes_de_cuerpos_geometricos.pdfIn PDF document text
    • http://saxowuwu.rf.gd/vojonifudikojovini.pdfIn PDF document text
    • https://s3.amazonaws.com/tasufagijaremo/humanist_ceremony_booklet_template.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/epf_withdrawal_form_31_online.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/nibizuzitijobaxole.pdfIn PDF document text
    • https://s3.amazonaws.com/woxotopapozokev/69777178761.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10380 5244 bytes
SHA-256: 6a4566a2edf79ef3cd0fd4cb10da008438613d84cf1ca58c803b6715617d8686
font_01_sfnt_off0001151a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1151A 10672 bytes
SHA-256: 2fa2118c8043a9aedd1aebcb2ac11afd5c192f6b347dee644b3bfacb2eac301a
font_02_sfnt_off0001398d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1398D 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

Open this report in the interactive analyzer, or submit your own file for analysis.