Malicious PDF — malware analysis report

Static analysis result for SHA-256 de1f120c8191a964…

MALICIOUS

PDF

81.7 KB Created: 2021-03-28 16:53:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 29ad5d59d04142f63bc94de31ebb717a SHA-1: afae6f251eed40973a64d28e2ebc38ec1ff0e8f6 SHA-256: de1f120c8191a96486e52b152f2b6410e528f7c2a1b746a4ee5a100fcbbd483a
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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.
  • 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://golowaki.ru/wix?keyword=what+is+a+use+case+narrative PDF link annotation
    • http://piwofoterif.sportsontheweb.net/pdf_file_download_using_php.pdfIn PDF document text
    • https://wepeweguwerixum.weebly.com/uploads/1/3/1/8/131856135/jujaborutebaletawilu.pdfIn PDF document text
    • https://kumakisatosoref.weebly.com/uploads/1/3/5/3/135328720/nazakamu_lilarifuwoxi_zunal.pdfIn PDF document text
    • http://sozapemogoz.mygamesonline.org/mesamuz.pdfIn PDF document text
    • http://dapunajav.22web.org/wamarilupexeso.pdfIn PDF document text
    • https://voxivunesiru.weebly.com/uploads/1/3/1/4/131407918/nolutojikux_likezu.pdfIn PDF document text
    • http://fexabudobix.getenjoyment.net/92851025519.pdfIn PDF document text
    • http://patajafurep.mywebcommunity.org/modernization_and_bureaucratic_authoritarianism.pdfIn PDF document text
    • http://jajuviramigawo.medianewsonline.com/tongue_twister_free_download.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
    • https://s3.amazonaws.com/vosimalume/16368502194.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/tas_united_answering_service.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/muwifiloropesi.pdfIn PDF document text
    • https://e8ceee85-86bf-4804-80ab-d7a1511cbcf5.filesusr.com/ugd/38650a_dd7274ef05b54ab1b392ce2e54a8db01.pdf?index=trueIn PDF document text
    • http://lazedotolizove.rf.gd/ruzivezusetirukaseliko.pdfIn PDF document text
    • https://6323cc82-cf72-43ae-bc7a-f8d691a1d37e.filesusr.com/ugd/4f3578_272d0cd77b6c4561af9f2d4cf877721e.pdf?index=trueIn PDF document text
    • http://tafiwepamubov.atwebpages.com/nezidexuvab.pdfIn PDF document text
    • http://tujupifirafadus.myartsonline.com/how_to_insert_file_in_excel_as_icon.pdfIn PDF document text
    • http://walevuzu.epizy.com/casio_f91w_rose_gold.pdfIn PDF document text
    • http://vumamuv.myartsonline.com/903400085.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_off0000f60d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF60D 4700 bytes
SHA-256: a8c90f5c0390cb24498f94f1be654bd5773c7d7906f03e5b54612c1fb8fd28e8
font_01_sfnt_off000105fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105FB 11132 bytes
SHA-256: 037be8ef1cad6ecbeb91caca11951aa12b4fd78ff151732ae73520efb753c84c
font_02_sfnt_off00012ba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BA0 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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