Malicious PDF — malware analysis report

Static analysis result for SHA-256 4226beedab247cfa…

MALICIOUS

PDF

82.2 KB Created: 2021-02-16 18:03:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: d1b2da846826968bcc494351b5793629 SHA-1: 8be98b097f9e2595bd7ebd5143c56f03f2257dff SHA-256: 4226beedab247cfa849625146ee11fc8ca5b1b6d3d37499d72dbe7134968a05c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly subdomains, suggesting a link farm or redirection mechanism. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/123?utm_term=how+to+prepare+for+gre+exam+at+home PDF link annotation
    • https://palogipotutaz.weebly.com/uploads/1/3/2/8/132814365/papubinuwefosisibuw.pdfIn PDF document text
    • https://gopadafuwidu.weebly.com/uploads/1/3/0/7/130740623/679349f54f5876.pdfIn PDF document text
    • https://bapepewemeg.weebly.com/uploads/1/3/4/7/134702997/7081143.pdfIn PDF document text
    • https://xiwulugizasu.weebly.com/uploads/1/3/2/7/132741433/ba892cfad8bd.pdfIn PDF document text
    • https://cdn.sqhk.co/xipitufekaru/hhwidij/96244617460.pdfIn PDF document text
    • https://somokowu.weebly.com/uploads/1/3/1/3/131383604/7f658ab3d67.pdfIn PDF document text
    • https://cdn.sqhk.co/pagifizipafo/gKghjiH/ralivinumu.pdfIn PDF document text
    • https://memezuwiz.weebly.com/uploads/1/3/4/7/134702577/d3d04c8f.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/robumuduluwise/79614371189.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/swan_lake_easy_piano_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/angry_whatsapp_status_song.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/project_milestone_payment_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/un_climate_report_2018_ipcc.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/37977112455.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/brauhaus_hannover_speisekarte.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/printable_recipe_cookbook_template.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/lorraine_bowen_crumble_song_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/wafer_paper_peony_template.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/97365475885.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/59456314737.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/property_maintenance_worksheet_template.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_off00010590.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10590 5224 bytes
SHA-256: 115c20ffd9b91a74a0c9e0de0913271ff456ea205094c40f319ea0f50fd79a0e
font_01_sfnt_off00011747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11747 10536 bytes
SHA-256: 1ae87b344e20c8a41152748f6d26b49007948bc8beb09835cc3f5114e6a40468

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