Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f1c6af19d872208…

MALICIOUS

PDF

78.6 KB Created: 2021-05-06 12:43:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 4e1beb2a92eed44976bc1d1c613224fb SHA-1: 0fe3e28608e51d91e16ec302d5b3b0037f827f42 SHA-256: 7f1c6af19d872208c675d59539df8c7871d5df18549f2233f9a15ee06e1a7998
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. The document contains numerous embedded URLs, with one prominent URL pointing to 'baarspo.ru' and including 'merrill+lynch+home+equity+loans' in the query parameters, suggesting a phishing lure related to financial services. The presence of many distinct hosts and disposable domains indicates a link farm designed to obscure the ultimate destination or host multiple payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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 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://baarspo.ru/strik?utm_term=merrill+lynch+home+equity+loans PDF link annotation
    • http://zonitupupafof.sportsontheweb.net/lakumurosetufojeju.pdfIn PDF document text
    • http://boomua.site/valuation_gomtrie_cm1_polygones9bvo1.pdfIn PDF document text
    • https://tisuzibe.weebly.com/uploads/1/3/1/3/131379312/kekozet.pdfIn PDF document text
    • http://girepodemaz.getenjoyment.net/download_catechism_of_the_catholic_church.pdfIn PDF document text
    • https://bagerukuvimi.weebly.com/uploads/1/3/2/8/132815916/ronarij.pdfIn PDF document text
    • http://filuxunokenobud.mygamesonline.org/acids_bases_and_salts_tnpsc.pdfIn PDF document text
    • https://wixozini.weebly.com/uploads/1/3/4/3/134383912/xabezafagofolukab.pdfIn PDF document text
    • http://filitopalanima.22web.org/jigifogilit.pdfIn PDF document text
    • http://nakanilo.club/gerund_infinitive_bare_infinitivedvs8y.pdfIn PDF document text
    • http://xofebuledat.scienceontheweb.net/swot_format.pdfIn PDF document text
    • https://taxajoberaruvu.weebly.com/uploads/1/3/4/3/134320235/kelebupevis_kazaguvenaji.pdfIn PDF document text
    • http://bowuvudofi.scienceontheweb.net/what_does_2_timing_mean.pdfIn PDF document text
    • http://lebamimiji.22web.org/fifty_shades_of_grey_songs_mp3_download_320kbps.pdfIn PDF document text
    • http://agent-spv.space/fagokusakoxuzutva2qc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jeborawaleko.atwebpages.com/napuse.pdfIn PDF document text
    • https://2cc12256-1025-444a-bacb-901a9f007bda.filesusr.com/ugd/d1fcfc_d400e4025cff495fb03b30a0e3377431.pdf?index=trueIn PDF document text
    • https://01c19f78-c7d0-441a-b56a-8672493f87de.filesusr.com/ugd/9d66c7_0e223b27a1e543069ad6304125eb10ac.pdf?index=trueIn PDF document text
    • https://3176e400-c268-4dc0-8d69-08eae86937f8.filesusr.com/ugd/ea2f88_c4a4947be4cd4858821998ec465d861c.pdf?index=trueIn PDF document text
    • http://pazoluno.epizy.com/18062938229.pdfIn PDF document text
    • http://vipovanur.epizy.com/afterburn_aftershock_sylvia_day_ita.pdfIn PDF document text
    • http://bodegifu.atwebpages.com/aesculap_neurosurgery_catalogue.pdfIn PDF document text
    • http://raluxubitemuvot.rf.gd/ncert_biology_textbook_class_11.pdfIn PDF document text
    • https://12c48f50-3553-44c7-a31c-19fc5df83d07.filesusr.com/ugd/7e0eb0_3757484480184d8cabe5e815f0e8231e.pdf?index=trueIn PDF document text
    • https://19e6fc83-c281-4d06-93fd-e8b16a02b90a.filesusr.com/ugd/ce5d00_b6e619e87e574414b5adc9100662c425.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_off0000f655.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF655 5272 bytes
SHA-256: a16c562e31022bb67a2626439a15693baae1ad13dcbe1eda17f2befd51ac4618
font_01_sfnt_off00010829.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10829 10692 bytes
SHA-256: 7822685dc1013367ad0982d8a62e1c3e8db2b572e518a3def6819a90175c1d2e