Malicious PDF — malware analysis report

Static analysis result for SHA-256 287ffc02faf004e8…

MALICIOUS

PDF

79.7 KB Created: 2021-01-03 04:58:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 89a866520cd85520880afa0406dfc9ba SHA-1: 238fe3c59e50e9c13091a53c89fc8529fdd586eb SHA-256: 287ffc02faf004e84b5c8a59b11cb955af6b5b2d2fd51c2cf7423f9d2c85bd4c
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 of which are to suspicious domains, indicating a link farm or phishing attempt. ClamAV and ML classifiers also flagged this PDF as malicious. The presence of embedded URLs suggests an attempt to redirect users to malicious sites, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffe.ru/aws?utm_term=parallel+lines+properties+worksheet PDF link annotation
    • https://pemifapizu.weebly.com/uploads/1/3/0/7/130776061/guroruka.pdfIn PDF document text
    • https://bejutiluji.weebly.com/uploads/1/3/4/4/134493367/1902bd4b388a95a.pdfIn PDF document text
    • https://zewugijisisu.weebly.com/uploads/1/3/4/8/134885238/runis.pdfIn PDF document text
    • https://vajugape.weebly.com/uploads/1/3/4/7/134767319/dugino-sozuxarulepada-xasilopazavavag-libixogifes.pdfIn PDF document text
    • https://xusawoji.weebly.com/uploads/1/3/0/7/130739635/689ca099.pdfIn PDF document text
    • https://xujopikaxatanow.weebly.com/uploads/1/3/4/8/134850499/6555500.pdfIn PDF document text
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/705618.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
    • https://s3.amazonaws.com/mutirexa/birth_plan_template_uk_printable.pdfIn PDF document text
    • https://s3.amazonaws.com/gawabog/15107019376.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4227f9ca-c9b8-4281-8f5f-738aa2bb5480/pokemon_go_unlimited_coins_apkpure.pdfIn PDF document text
    • https://s3.amazonaws.com/sanekufiwumafo/guwujobatalez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f765225b-10d1-4f92-a7a2-6396e89a47a7/quien_invento_el_telefono_antiguo.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/89960748610.pdfIn PDF document text
    • https://s3.amazonaws.com/musokejixami/bole_chudiyan_mp4_video_song.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/moon_acl_reconstruction_rehabilitation_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/tetofamuxulil/lilakaxawufo.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_off0000ee7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7B 4852 bytes
SHA-256: cdc7c14de3d143c6c8cc81e302f873b15d69771829c007b4d9e900b43106b172
font_01_sfnt_off0000feef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEF 10668 bytes
SHA-256: 8c8970a51d7b2f37f04705a0bfa857d24b1981b54e271bd005123edf9cd44542
font_02_sfnt_off0001237c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1237C 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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