Malicious PDF — malware analysis report

Static analysis result for SHA-256 2907295ba9b1ba5f…

MALICIOUS

PDF

74.1 KB Created: 2021-04-08 23:04:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d06838ab9ab4ab9d434d2d5cf7465c8a SHA-1: c1bc29b9584ef02dd1655b420b9a5dd7d703ecc8 SHA-256: 2907295ba9b1ba5f366792e04ccdbf12ba71c477f16f3d195d856c60f4301779
156 Risk Score

Malware Insights

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

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 0.9991

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://crophysi.ru/strik?utm_term=ge+eterna+series+electric+stove PDF link annotation
    • http://flowerport.shop/258186830507kfyy.pdfIn PDF document text
    • https://febefadu.weebly.com/uploads/1/3/1/4/131453100/tojezepodegofoj_xalewebupe.pdfIn PDF document text
    • https://nexonurobev.weebly.com/uploads/1/3/4/3/134371674/nujonu-segomis-mitibuzedolugun-mulubobad.pdfIn PDF document text
    • https://foluxafan.weebly.com/uploads/1/3/5/3/135397430/notijobow.pdfIn PDF document text
    • http://goldotzyv.ru/912237980588lkrq.pdfIn PDF document text
    • https://fojevatiseme.weebly.com/uploads/1/3/4/4/134400043/4d97ce796535a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://f9c380c0-3c9a-404e-8c76-a924832b335c.filesusr.com/ugd/9c8fb9_826831001d7c4aefa1dbe67d2a61794f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/libosokune/mabapotukavaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e65979c9-5af9-41d0-a0bb-39108f7da4a8/85620801008.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/xugixetub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f3a3c5c-e0e0-4cc2-a5e3-8f8899c64008/fantastic_mr_fox_characters_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/sujet_brevet_blanc_maths_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/jujavipimepizip.pdfIn PDF document text
    • https://s3.amazonaws.com/joterige/rrb_alp_cbt_2_answer_key.pdfIn PDF document text
    • https://3c3b6f52-20a2-448a-be11-eec5930c502f.filesusr.com/ugd/0ca786_784098f630ea4134a629b0f5b78f6f51.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/gotekozadesas.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/beautiful_camera_makeup_selfie_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/dell_latitude_3490_spec_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/2019_joint_commission_survey_guide.pdfIn PDF document text
    • https://4779f2f8-a33e-4327-9c78-21ee0bcf4620.filesusr.com/ugd/31bf02_ba5988eab6504199aef088adb327c9e5.pdf?index=trueIn PDF document text
    • https://89d9876f-4e47-4433-ab5b-8da47ae3ae5c.filesusr.com/ugd/37c326_6af8e7435ce143a0a830857ede3cbfc5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/04df3e95-71b4-45b4-b317-d27a578ee60e/helter_skelter_an_american_myth_online_subtitrat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e43f245c-794f-4695-afb0-0a972a22ab63/internet_service_providers_mumbai_maharashtra.pdfIn PDF document text
    • https://ebd73b9a-b255-48a5-b781-2bd84b483b4c.filesusr.com/ugd/956c05_4b2df0305be44f8490854c63b97a4e57.pdf?index=trueIn 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_off0000e64b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE64B 4884 bytes
SHA-256: 6b7373d144951df591a7e2fb08a28f899d1a4d1dc0ee1bebf51784f0f80a5342
font_01_sfnt_off0000f6fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FE 10648 bytes
SHA-256: c32d3195bd0f53691cf23d503e59434d4dd406c06a82e0d4a7b10a787a44efe0