Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbaf6c0f324bf2b0…

MALICIOUS

PDF

69.6 KB Created: 2021-04-03 19:59:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d050e9032ba371aca1bb420fdaa3ea6 SHA-1: bac12fa418046d8ad4c4789e90fcf3ace4399984 SHA-256: fbaf6c0f324bf2b07f3ec9a9b3c1bbfcfb8ffbfc93660b1dbc1d9fe5d2e473e1
156 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many pointing to other PDF files, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware distribution. The embedded URLs are the primary indicators of compromise, directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/strik?utm_term=1976+johnson+6hp+outboard+manual
    • https://xozavefo.weebly.com/uploads/1/3/4/0/134018900/tuxugowes_gazom.pdf
    • http://mmeueue.space/35970477369ri4n7.pdf
    • https://rolorizumi.weebly.com/uploads/1/3/4/3/134316308/7543694.pdf
    • https://xifupanudolegu.weebly.com/uploads/1/3/1/1/131164204/56714ef9a.pdf
    • https://renobikedasel.weebly.com/uploads/1/3/4/8/134897329/kofurugakujiko_gupemuwodure_navovu.pdf
    • https://vevusivo.weebly.com/uploads/1/3/0/8/130874001/7190f7e1c.pdf
    • http://navaram.online/hackerrank_mcq_questions_with_answerst5biz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/pazerogasarinu/jazuxevopona.pdf
    • https://uploads.strikinglycdn.com/files/8c833f49-d029-44eb-afb3-c6da733aefda/los_personajes_principales_del_coronel_no_tiene_quien_le_escriba.pdf
    • https://s3.amazonaws.com/tobobowu/83669105971.pdf
    • https://uploads.strikinglycdn.com/files/c908e4ac-7d4a-453d-97b7-8da60b1a18e0/sotuvukuragolexasakogo.pdf
    • https://s3.amazonaws.com/zosevid/la_casa_de_bernarda_alba_personajes_hijas.pdf
    • https://uploads.strikinglycdn.com/files/abada1db-5edc-4292-9958-f0e82d16dab3/porutozevutamenimuleto.pdf
    • https://uploads.strikinglycdn.com/files/d78984eb-18d1-4827-a46c-b1d4c959d3a7/limiviz.pdf
    • https://s3.amazonaws.com/tinezedu/public_finance_management.pdf
    • https://eaae50f7-3b1c-4f1b-9b3c-e2a48377569d.filesusr.com/ugd/b96e41_c27e1b5a2c4b467f9a65139a69f77992.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5eb9d9d3-1f25-489b-945d-ba6029fd9242/how_to_answer_who_are_you_question_in_an_interview.pdf
    • https://uploads.strikinglycdn.com/files/bf334301-8d38-482d-9b92-8fc941d93c00/jowoxanijewixekeli.pdf
    • https://8f7ea519-0f04-4608-87c3-d83a7406251f.filesusr.com/ugd/2d1648_acc72e6c280a4da699ea02d87737bb88.pdf?index=true
    • https://77a80da1-97a3-4b40-ba11-54c6d232eb66.filesusr.com/ugd/39a0fd_c60ff05b316a43de84d9a671851d018c.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d130.bin
d6a062053b02962651ddcfd11dafb8ef045118616bd9a6a30bf6e40cfa4ad082		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD130 5760 bytes
font_01_sfnt_off0000e49c.bin
01ff5815bc060116f91c925212b918c33ea3d06fa5c4498854f5bef84b4ff137		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE49C 10664 bytes

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