Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfeece2864de5264…

MALICIOUS

PDF

75.3 KB Created: 2021-04-04 09:51:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 42d2d7f108446d172c023701f913a4e0 SHA-1: 4e737dcc5c31fa241c321e068a230da15e916cec SHA-256: bfeece2864de52641839e7ade36fb9c9ed22289c4f60b5ba805ff583aeabb454
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 0.9992

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://jottigo.ru/wix?keyword=dishonored+2+trophy+guide+and+roadmap PDF link annotation
    • http://satijafi.22web.org/wupupo.pdfIn PDF document text
    • https://waxalema.weebly.com/uploads/1/3/4/3/134364729/kejoduzo.pdfIn PDF document text
    • https://nadazilagola.weebly.com/uploads/1/3/4/3/134314388/tapupusorekokip.pdfIn PDF document text
    • https://tutamedu.weebly.com/uploads/1/3/1/8/131856186/5947450.pdfIn PDF document text
    • https://jepemanek.weebly.com/uploads/1/3/4/5/134589705/viridaxogegefis-tatepuxaw-denureja.pdfIn PDF document text
    • https://jupolojujilozas.weebly.com/uploads/1/3/4/5/134598947/755e3d3865.pdfIn PDF document text
    • https://nagajaburelu.weebly.com/uploads/1/3/2/7/132740350/zolana.pdfIn PDF document text
    • http://daxogupifixago.iblogger.org/ap_polytechnic_lecturer_notification_2019.pdfIn PDF document text
    • https://ladeletoleworuw.weebly.com/uploads/1/3/4/7/134712388/a50c8236936a.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/kovezux/ditafapoladivifogot.pdfIn PDF document text
    • https://s3.amazonaws.com/vefagotoje/wonder_by_rj_palacio_book_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5014029-df64-4e93-9fed-9508413dc716/45772947621.pdfIn PDF document text
    • https://9fbaa0db-fe9e-443e-b503-3d02ea494c21.filesusr.com/ugd/d417e9_9ebee6cb933f46438578973398ebd8af.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gazivemon/kitesimuvulasosodu.pdfIn PDF document text
    • https://85377554-d84f-42a6-a955-c87f7d5d3d8c.filesusr.com/ugd/dd4472_5831c4fa76a94d29b187586e39daaf1e.pdf?index=trueIn PDF document text
    • http://mulusatore.rf.gd/ap_lab_2_enzyme_catalysis_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7f474a9-3b9c-47cc-bc71-a8154069e7b1/amar_o_depender_para_descargar_gratis.pdfIn PDF document text
    • https://abce285d-6075-46f9-9a04-301384c1f7e7.filesusr.com/ugd/e5cbe5_7bd34be5866e4d0f86fcade816eab737.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/010a6c8a-d18a-4f52-875e-18e3235dd629/what_powers_do_the_twins_have_in_miss_peregrine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b20c869-5f5e-483d-8686-18ad44ee8b17/how_to_cook_a_ribeye_roast_in_a_pressure_cooker.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/samsung_un43j5200afxza_dd02.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/genentech_email_address_format.pdfIn PDF document text
    • https://0df22b04-17ae-4e65-9af8-3af4445b4601.filesusr.com/ugd/71fd01_72e69fbacb4648d4b53b26580e571244.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_off0000e691.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE691 5576 bytes
SHA-256: 278048d155fa0369dc0e022c06c9b7a00fcfd0b7ed73e5e931934e5112a36c5f
font_01_sfnt_off0000f965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF965 11048 bytes
SHA-256: 1fee21f6fa214e7c3e61638d290e8447392a75629fd7204f21fc33f769798240