Malicious PDF — malware analysis report

Static analysis result for SHA-256 369b3dae67cb2c3e…

MALICIOUS

PDF

83.5 KB Created: 2021-03-29 18:58:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 522507691ac65ff2c9d040f2e8b71540 SHA-1: 9d4ffd1c2cc5f9e39c640f2b278336d90cd7f205 SHA-256: 369b3dae67cb2c3e785c1dcfbd03ce20229b2336f5aa9211de9bb2b49626f1d6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9919

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://xezojetit.ru/wix?keyword=name+and+measure+angles+worksheet PDF link annotation
    • https://volufijipezuji.weebly.com/uploads/1/3/4/7/134703795/1870676.pdfIn PDF document text
    • http://abouts.space/5093117537791r8d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469353/normal_5fe76ee0c5713.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500679/normal_601e4412df117.pdfIn PDF document text
    • http://badgesverified.com/how_to_clean_the_drain_hose_on_a_dishwasher9vfog.pdfIn PDF document text
    • http://allostar.buzz/3346900289630wxq.pdfIn PDF document text
    • http://car-test.pro/kuxoperemecr4x.pdfIn PDF document text
    • http://jexafagod.22web.org/sokakagaxosafijejogag.pdfIn PDF document text
    • http://getliterate.online/learn_tamil_in_30_dayszrp47.pdfIn PDF document text
    • http://wejnpowk.space/paxuxusvauv.pdfIn PDF document text
    • http://itsamorem.com/bnp_paribas_share_performancejau6e.pdfIn PDF document text
    • http://littlenat.space/53407692856fpzka.pdfIn PDF document text
    • https://vewirorerisemi.weebly.com/uploads/1/3/4/6/134627211/6de2d714b12a83d.pdfIn PDF document text
    • https://jafiwivejo.weebly.com/uploads/1/3/5/3/135305612/8efdfcec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378382/normal_601105425f2dc.pdfIn PDF document text
    • http://regse.website/onlinemeded_quick_tables_downloaec86f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372740/normal_603127c507292.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384483/normal_601cb2ed39736.pdfIn PDF document text
    • https://kexanitafax.weebly.com/uploads/1/3/0/8/130813084/5f410.pdfIn PDF document text
    • http://stikc.xyz/cnet_adobe_reader7ofgj.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://gifimedirawi.epizy.com/52085115064.pdfIn PDF document text
    • http://gamovomubapo.rf.gd/34865048052.pdfIn PDF document text
    • http://kerojuluped.epizy.com/used_solid_wood_office_desk_for_sale.pdfIn PDF document text
    • https://e22e8d81-f41f-4d51-abb1-39b19d2d32bb.filesusr.com/ugd/96bf9d_0e3932ae245b48a698bbb0c06f743fce.pdf?index=trueIn PDF document text
    • http://tatefubuzu.rf.gd/weblogic_server_for_oracle_forms_11g_r2.pdfIn PDF document text
    • https://acfc0e76-311d-46af-9c13-f46c112eb424.filesusr.com/ugd/f90bad_f2c6a077128c4821bd96f48b197f4b8a.pdf?index=trueIn PDF document text
    • https://dd3528e8-ded0-4753-843e-0d3cb9f542e7.filesusr.com/ugd/4d6844_1a5b45f2894348e089d399e09d14afee.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A0 5200 bytes
SHA-256: f2e5ba798528f9a5df579c6e9f067c623b1091f9464a99a38bf46bdd00725300
font_01_sfnt_off0000f82e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82E 10816 bytes
SHA-256: dc5749b86b54801f74d02f22ce4a97cd385ffe02fe23187437ebcac063466aaa
font_02_sfnt_off00011d24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D24 16072 bytes
SHA-256: 4ce97752c8d1ed0b0302a1507788019c6b738cc3ee96ca273f61f92c287db7cd
font_03_sfnt_off000131c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131C3 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333