Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb56568d687613a8…

MALICIOUS

PDF

75.3 KB Created: 2021-05-06 12:43:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: bcf1577bec836b8a758793b8ac1b5c1a SHA-1: f3dfa92027ebf4d63c09d4ad4d8d39399c489732 SHA-256: bb56568d687613a83c528282fdb25a898913be6ee0276eb832c550b6edc10778
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a prominent one pointing to 'baarspo.ru' and using 'merrill lynch home equity loans' as a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or a scam. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, aligning with T1566.001. The presence of multiple disposable domains used for hosting PDFs further supports a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9183

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://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

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