Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e2ed32d5e5fc197…

MALICIOUS

PDF

79.2 KB Created: 2021-04-29 03:41:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d7b73ff5ac5387a9c2f6513052ca2826 SHA-1: 874ab77f8ce77e8dbc758b1da47eb03fa6c8739b SHA-256: 9e2ed32d5e5fc1971db33541545b8c8c7d04e1b045f93fc23bc33f3d7cc797ba
186 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 0.9997

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
  • 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.
  • 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://maypoin.ru/strik?utm_term=audacity+tutorial+editing PDF link annotation
    • https://gavufiwi.weebly.com/uploads/1/3/0/7/130775220/fikefus_gowuvufadum_banezulusux_tijobawijonexuw.pdfIn PDF document text
    • http://judupebe.getenjoyment.net/akuntansi_keuangan_menengah_1.pdfIn PDF document text
    • https://bigimegena.weebly.com/uploads/1/3/1/4/131438437/vufemibizovul_teroze_zekutovakuzode.pdfIn PDF document text
    • https://sodomolu.weebly.com/uploads/1/3/5/3/135398587/supefifizujenik.pdfIn PDF document text
    • http://sodamasagu.66ghz.com/60414293450.pdfIn PDF document text
    • http://betizekaxu.getenjoyment.net/official_email_writing_samples.pdfIn PDF document text
    • https://lapokatodulobak.weebly.com/uploads/1/3/5/3/135347459/xefamogi.pdfIn PDF document text
    • http://pasadurasasagi.medianewsonline.com/active_passive_voice_exercise.pdfIn PDF document text
    • https://faperusa.weebly.com/uploads/1/3/1/4/131454178/caec66.pdfIn PDF document text
    • https://gumomerad.weebly.com/uploads/1/3/1/8/131856086/bigorodi_nofevanuvovemis_rojefafiko.pdfIn PDF document text
    • https://muxolebutelun.weebly.com/uploads/1/3/2/7/132741382/7d26f286de4.pdfIn PDF document text
    • http://nakaxovatixokew.22web.org/total_conquest_apk_unlimited_money.pdfIn PDF document text
    • http://tenakotete.22web.org/xowisomijereda.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://deburukibovip.rf.gd/how_to_make_a_scalene_triangle_in_illustrator.pdfIn PDF document text
    • https://ad646471-8556-449a-8150-55a6f6ff724f.filesusr.com/ugd/7a1c5b_1cf47df3aad647acb90a4bdf29abe88c.pdf?index=trueIn PDF document text
    • http://kulojivalavixo.rf.gd/gurolofej.pdfIn PDF document text
    • https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_53745401b08d4647b4ed80ce2899803c.pdf?index=trueIn PDF document text
    • https://044ec7df-721b-4788-b209-87474a3fcb06.filesusr.com/ugd/60ffa2_e622901b485543b7836ed0bc824f49d1.pdf?index=trueIn PDF document text
    • https://05efeaee-ea5b-4dc8-bddc-a5098cc0dcbd.filesusr.com/ugd/c06c30_85dacc902ce84de19b2375612215b4f8.pdf?index=trueIn PDF document text
    • http://votatabebunika.rf.gd/cetoprofeno_gotas_bula.pdfIn PDF document text
    • https://41d9b059-0b17-466b-96e6-f31a3f3e9b19.filesusr.com/ugd/f1ead9_52e563ab38404667afd0be82a15aaead.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_off0000fa51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA51 5020 bytes
SHA-256: f4dbc62831f32e21f087457175a0462a4dcf18881a05ba4b4cb2944783e76fb5
font_01_sfnt_off00010b78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B78 10576 bytes
SHA-256: 8652a866b93f1702fd76ec84d6a04c62db19dc6abf7bccfc2c97b62476c8873d

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