Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ebd9f0b59471f43…

MALICIOUS

PDF

78.8 KB Created: 2021-03-08 03:58:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6873da2a3469ae22b987de69868f13f1 SHA-1: cf0257b89ad4df89fafb79e539ec21c3f9c1973b SHA-256: 3ebd9f0b59471f43b2d539735d1673cf921d5aca2fe47835d2dc6ef95515b9f4
194 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/wix?keyword=paper+mario+randomizer+download PDF link annotation
    • http://votixibutiro.medianewsonline.com/fexavaj.pdfIn PDF document text
    • https://gozezitigaja.weebly.com/uploads/1/3/4/3/134340412/supikititibus.pdfIn PDF document text
    • http://jifebaze.iblogger.org/should_students_have_homework_article.pdfIn PDF document text
    • https://tibiwurab.weebly.com/uploads/1/3/2/6/132695994/musefabevip_degizamubete_reguziwoxa_xuzotovi.pdfIn PDF document text
    • https://dodemitewiv.weebly.com/uploads/1/3/1/3/131380707/wuzuno.pdfIn PDF document text
    • http://fenofaxizuva.22web.org/munafik_2_astro_first.pdfIn PDF document text
    • https://rorupuloloxotog.weebly.com/uploads/1/3/1/4/131409755/farekorejarula-nolepovanop.pdfIn PDF document text
    • https://wutiduxa.weebly.com/uploads/1/3/5/3/135300785/selavutuwekad.pdfIn PDF document text
    • http://pararapameso.getenjoyment.net/what_are_the_main_features_of_a_christian_funeral.pdfIn PDF document text
    • https://soxokelu.weebly.com/uploads/1/3/4/4/134494323/5953031.pdfIn PDF document text
    • https://vimexizud.weebly.com/uploads/1/3/4/7/134755563/votudi.pdfIn PDF document text
    • https://rapusixub.weebly.com/uploads/1/3/4/6/134631860/xexurer.pdfIn PDF document text
    • https://sofamilases.weebly.com/uploads/1/3/5/4/135401016/bigul-vuxulinupa.pdfIn PDF document text
    • https://jabelobiwisaga.weebly.com/uploads/1/3/1/6/131636903/b3b9a415b07.pdfIn PDF document text
    • https://tebiwexarug.weebly.com/uploads/1/3/1/3/131380746/pujede.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://pifixoga.epizy.com/fusebupoxedemu.pdfIn PDF document text
    • http://xaduvegovoz.rf.gd/how_to_identify_bond_angles.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02127295-7c30-4262-ace4-4be9c5ab95df/ludogisuripam.pdfIn PDF document text
    • http://magetasejo.epizy.com/tascam_dr_40_v2_vs_zoom_h4n.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df76d917-e708-4770-b9db-b0a8ce43bd98/17524182481.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53272b2a-a90a-4e41-b995-90595769cde1/zeted.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC59 4776 bytes
SHA-256: 0ae46a0ea0ee3df690045de15e0aeb9c546b0c6fdddf496330e5e7d5f6cf7791
font_01_sfnt_off0000fc7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7E 10384 bytes
SHA-256: 469f8290b590932959c5fad9ec49fc9398fadc609ab66c40e1f8d954153effac
font_02_sfnt_off00011fcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FCC 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378