Malicious PDF — malware analysis report

Static analysis result for SHA-256 382eb4aff5111564…

MALICIOUS

PDF

76.1 KB Created: 2021-03-03 06:58:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 7790f357ef4ad5db2d07add2397a15d6 SHA-1: 98c87b7b03e0a64f24d30da203456369968489c1 SHA-256: 382eb4aff51115649272a5a247e44686a9b3392f039b2687e56a5e9a3f98f0ef
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a link farm, pointing to various PDF documents hosted on external services. The primary URL, 'https://pelibifir.ru/award?keyword=who+was+on+the+rap+game+season+3', suggests a lure to entice users to click on these links. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pelibifir.ru/award?keyword=who+was+on+the+rap+game+season+3 PDF link annotation
    • https://disabamabasato.weebly.com/uploads/1/3/1/0/131070072/vapuwovukuke.pdfIn PDF document text
    • https://lolidinol.weebly.com/uploads/1/3/4/8/134884516/kixamaxizajis.pdfIn PDF document text
    • https://nafepamozox.weebly.com/uploads/1/3/1/0/131070284/bonixufumimoju.pdfIn PDF document text
    • http://kifopelidito.mypressonline.com/chick_fil_a_10022.pdfIn PDF document text
    • https://cdn.sqhk.co/tapuvimixaxo/13Ggijf/zoxajivomikelexasukikefa.pdfIn PDF document text
    • https://cdn.sqhk.co/pananumujo/hdid7ji/micro_machines_v4_pc_game_download_free.pdfIn PDF document text
    • https://lezexoxutipeb.weebly.com/uploads/1/3/4/4/134462335/2528735.pdfIn PDF document text
    • https://wirazalalotun.weebly.com/uploads/1/3/0/7/130776536/4203883.pdfIn PDF document text
    • https://pugewolusaw.weebly.com/uploads/1/3/1/4/131453132/8ffba07e18d4afe.pdfIn PDF document text
    • https://zipusuborulam.weebly.com/uploads/1/3/0/8/130814510/1b30164351adfb5.pdfIn PDF document text
    • https://bezamefiparafu.weebly.com/uploads/1/3/4/6/134665790/gizadiwirawugo_zivot_wupawunozewixo_vebofitefevod.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/sajezife/28078724973.pdfIn PDF document text
    • https://s3.amazonaws.com/povodijirig/fraction_addition_and_subtraction_word_problems_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bisiku/pabogexinagozibedova.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/16322620453.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/leboxitejagejivi.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/xasujasemave.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED88 5468 bytes
SHA-256: 33356dfc6537a60b675f2d40f077528a97467eedac87052a749f12cbcab7ada2
font_01_sfnt_off00010016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10016 10280 bytes
SHA-256: 46bf734b4c8f57de0c680678bf5713def470ffe2ab281805c53df65f5cf5b126

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