Malicious PDF — malware analysis report

Static analysis result for SHA-256 adee06f9edefd25d…

MALICIOUS

PDF

77.3 KB Created: 2021-05-20 00:16:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: cb00301f45e0c640e4155d107d81bd36 SHA-1: b8b5cb68d00871515a3b53e00b4ac82b7557507c SHA-256: adee06f9edefd25d785d2b1c4027719cf83bf32df1cd22535604972887a1deb6
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a large number of external links, a technique commonly used in SEO link farms to manipulate search engine rankings or distribute malicious content. The primary URL, https://fokemale.ru/strik, is suspicious and likely leads to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

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://fokemale.ru/strik?utm_term=exercices+corrig%25C3%25A9s+sur+les+bascules+pdf PDF link annotation
    • https://tenipimip.weebly.com/uploads/1/3/4/0/134042327/lamosaziz.pdfIn PDF document text
    • https://nesexije.weebly.com/uploads/1/3/1/6/131607346/jodixixepo_puwapanesuvok.pdfIn PDF document text
    • https://rogubofiduga.weebly.com/uploads/1/3/1/0/131069879/1e5f7.pdfIn PDF document text
    • https://pozivikebesar.weebly.com/uploads/1/3/4/7/134759309/9683080.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/fomaralunex/elements_of_plot_worksheet_6th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edb1ea3d-925c-4544-adb7-101aa5330796/cloudy_with_achance_of_meatballs_2_barb_voice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03584012-5ee4-4eb9-99c3-8412fb4a8a58/27560600118.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79e4cd23-4737-4bd7-9312-a4e382f8a886/wamiwaxuxewef.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/16359473285.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c30b0c90-7e26-4622-91ae-399f500f9acc/suxipubirozogin.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/lista_de_exercicios_arcadismo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3c8734a-50fb-4603-8646-60ce4e5de628/marine_corps_winter_survival_school.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/xamakakajurunexoxomu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d65dd44-2210-4f66-822a-1376ee632f17/99012782133.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/devexpress_report_designer_react.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ee648a2-7d2f-47a9-8a98-2318dad72cb0/convict_conditioning_routine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca36db16-1178-477a-a46a-1bb345be8f0d/the_three_questions_by_leo_tolstoy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2a960d0-6326-41a2-83ad-301afa74278d/nix_8_inch_hd_digital_photo_frame_review.pdfIn PDF document text
    • https://s3.amazonaws.com/dopugaxelelema/22041297192.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_off0000ebcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBCC 5632 bytes
SHA-256: ec76d269a65c3e2477b3180049b4619504ba71bee1aecf337a07172112d9b037
font_01_sfnt_off0000fec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEC2 12228 bytes
SHA-256: 5dbccfbbb375e4cef74e070befc51fcae158d17a3835049779a5f661f952cf40

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