Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcf72c5d362a6664…

MALICIOUS

PDF

74.9 KB Created: 2021-03-27 14:44:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc772d18923df1ceb2264877a38ceb50 SHA-1: 9f1389c4cf253a3cb428fd7e23d3585bfa6f97f9 SHA-256: bcf72c5d362a66649e4373c2356ea57750fbf2de40c52ca968a18c2985abe5b9
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which point to domains commonly associated with SEO link farms and phishing lures. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/award?keyword=hasil+amandemen+uud+1945+1+sampai+4+pdf
    • http://startask.ru/astro_a20_ps5_best_buytfot8.pdf
    • http://fesotisifofil.mygamesonline.org/2000_ford_ranger_steering_wheel_cover.pdf
    • http://mikrotikwizard.com/que_es_la_inteligencia_emocional_en_psicologiakls3d.pdf
    • http://pukebebizadolu.mypressonline.com/11228407470.pdf
    • http://xokezuwadem.mygamesonline.org/79903761413.pdf
    • https://jigurojo.weebly.com/uploads/1/3/5/3/135321607/61419863ab815.pdf
    • http://gordei2d.com/cambridge_7_test_3_listening_answerswjerh.pdf
    • http://pestore.pro/8th_grade_scientific_notation_worksheetovue2.pdf
    • http://sijiwepi.mypressonline.com/stannah_lifts_fault_codes.pdf
    • https://zojokoladateru.weebly.com/uploads/1/3/4/4/134497877/gaweneda_kaxawifuwegabi_vewesim.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://ff102949-4c65-4b7b-925c-ea9a98d885fa.filesusr.com/ugd/7a16bb_42961c52dec348ecbcd05f381a19e2bd.pdf?index=true
    • https://1482387f-61d8-47e1-b538-9b7f1e8b89fb.filesusr.com/ugd/538d67_808a1089519c4324b5c227e8a65ab918.pdf?index=true
    • https://c7bff75e-0a19-4817-9d47-fca4cf08161b.filesusr.com/ugd/3b6424_6883545a9a5f4b839931ca9a74b6ad1c.pdf?index=true
    • https://0a497e50-07dd-462d-832d-d8678f741a8e.filesusr.com/ugd/5f857b_b56aaed6977a4817bae5c59da7a481db.pdf?index=true
    • https://s3.amazonaws.com/womirofop/52999248964.pdf
    • https://uploads.strikinglycdn.com/files/003d7d99-b509-4e73-8f91-673a69eaef88/principles_of_environmental_engineering_and_science_3rd_edition_free.pdf
    • https://s3.amazonaws.com/remavuj/android_ndk_cmake_command_line.pdf
    • https://uploads.strikinglycdn.com/files/bf79f718-4fd9-4595-acad-3c95a666ef9c/rmv_watertown_make_an_appointment.pdf
    • https://e61e9f85-32c5-4861-9fd4-b89109084c35.filesusr.com/ugd/2e4eb4_e1d46868f2504495b3d2200fadb30337.pdf?index=true
    • https://s3.amazonaws.com/fodose/flowchart_template_google_slides.pdf
    • 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_off0000e876.bin
80df40a2e46c2156d842ab2443b37cee6d37ac75284e655f8b2b629f021aa963		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE876 5472 bytes
font_01_sfnt_off0000fb0a.bin
5f80e94bf094158f102beff773f68f286eb2ad5fbf3d47c116f6f238a38b1b2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0A 10292 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.