Malicious PDF — malware analysis report

Static analysis result for SHA-256 aef8e6db1d34906c…

MALICIOUS

PDF

78.4 KB Created: 2021-02-27 17:36:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 15740b6bc01f2d34828e2e41eb1b7be7 SHA-1: aa1ec2dd9384372898cf5769d631f833626a863e SHA-256: aef8e6db1d34906cf17ceef2f3010d3bac0a52346376b85d517098f9c71af943
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO spam or phishing. The ClamAV detection and ML classifier strongly indicate malicious intent. The embedded URL points to a suspicious domain, likely serving as a landing page or redirector for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/strik?utm_term=nursing+diagnosis+for+pneumonia+patients PDF link annotation
    • https://fogofude.weebly.com/uploads/1/3/4/3/134322730/jezoxezoxidumu-zonubariwad-zitivaruteb-livumol.pdfIn PDF document text
    • https://soneputud.weebly.com/uploads/1/3/1/4/131411150/3563cdaf5.pdfIn PDF document text
    • https://rawebitor.weebly.com/uploads/1/3/4/3/134337567/6209665.pdfIn PDF document text
    • https://pivenalelan.weebly.com/uploads/1/3/2/8/132815337/mufikonumapidinenake.pdfIn PDF document text
    • https://pamezupiv.weebly.com/uploads/1/3/0/7/130775156/larakataluj_futepatuluf_famopokarunized_kotukenut.pdfIn PDF document text
    • https://rawadawopi.weebly.com/uploads/1/3/0/8/130874142/fegiwugipimozod_muzuja_sovovujoz.pdfIn PDF document text
    • https://nagiliju.weebly.com/uploads/1/3/1/4/131412426/sopasibazi.pdfIn PDF document text
    • https://rugisuvo.weebly.com/uploads/1/3/4/4/134438002/demadokoxitewu.pdfIn PDF document text
    • https://garasomebopite.weebly.com/uploads/1/3/0/7/130775476/zoxutirew.pdfIn PDF document text
    • https://tapizijivuvol.weebly.com/uploads/1/3/2/6/132696465/vemaseturikumenudonu.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/zafijukopa/78486511902.pdfIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/karifotenomilad.pdfIn PDF document text
    • https://s3.amazonaws.com/buganabowumujef/payback_2_pc_version.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/mefalevovafemuvexidas.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/legonilazovekokuxi.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/chatib_apk_app.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/mepakabelemitupugavil.pdfIn PDF document text
    • https://s3.amazonaws.com/vefagotoje/printable_number_line_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gifiz/wodifuzitalogutiga.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/coraline_graphic_novel_free_online.pdfIn PDF document text
    • https://s3.amazonaws.com/xojafemori/letenixem.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_off0000f5fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FA 5300 bytes
SHA-256: f80e6e6aa5c89c025c6739ae061c19ac266f5fd86d50d389b495f150987907f4
font_01_sfnt_off000107f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F0 10588 bytes
SHA-256: 3b603d959b665e11ae8d2d341f3326ac67cb48894a8fbe1cbed99a4593534e47

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