Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfe322364f63d5b5…

MALICIOUS

PDF

73.8 KB Created: 2021-04-11 20:15:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 8100104cd0deff8d29f1d4b79b870500 SHA-1: 68ee519d632b4489bb5a2731f9a9cda0ecc8c704 SHA-256: dfe322364f63d5b55a6229dbab151806f1a38d8e5710a7b94e489408168631e0
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a primary link to 'golowaki.ru' disguised as information about a motorcycle jack. This suggests a phishing or scam attempt to redirect users to a malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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/strik?utm_term=how+to+use+craftsman+motorcycle+jack PDF link annotation
    • http://sigifiketatoge.22web.org/71414373261.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0c3b2bb2-3ac9-4e0e-a0b2-530a831cdf0d.filesusr.com/ugd/23193f_dba2df2e7fbd4e3299aa7f671a9e0755.pdf?index=trueIn PDF document text
    • http://fugexumelelada.rf.gd/30_day_diabetes_cure_recipes.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/56199571430.pdfIn PDF document text
    • https://7292b199-6d7c-4e84-b646-7854114497ba.filesusr.com/ugd/53361e_a965c837ce07460dbd96660c34936cca.pdf?index=trueIn PDF document text
    • https://f621ecf8-e26c-4db3-9bdf-176eeceb312d.filesusr.com/ugd/b3755e_46b9b8134f474a8ead084db63152ce93.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muxegeza/23883413302.pdfIn PDF document text
    • https://d56a38bf-d62e-453c-9b5b-5b2fe88aea46.filesusr.com/ugd/359e64_91548c097c6a4636ad2b6ea2c5899eaa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/libeganot/acid_base_and_electrolyte_chemistry.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/harry_potter_y_el_misterio_del_principe_libro_vs_pelicula.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/is_baldurs_gate_on_xbox_one.pdfIn PDF document text
    • https://s3.amazonaws.com/tutapaxi/allok_mpeg4_converter_full_crack.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/where_can_i_donate_toys_in_los_angeles.pdfIn PDF document text
    • https://5fdaa9e0-ad6d-443b-8779-beb8e45026dc.filesusr.com/ugd/05301a_f0613cabc78744c6970268df658ddc28.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/binikugitonudakif.pdfIn PDF document text
    • https://01dc7cc6-b8ed-446e-8cc8-1ad78882ed38.filesusr.com/ugd/e23fbb_ea1b104353f3413b9aacdb9fb8005866.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/21441815451.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/how_to_calculate_shear_force_in_a_simply_supported_beam.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/imf_economic_report_2019.pdfIn PDF document text
    • https://a21f0d7d-5fe0-4a99-a381-3b18266e0880.filesusr.com/ugd/6c313a_3ec1a8a686da45a5a5b8f5a22b5ac94e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zonivezada/financial_accounting_and_reporting_1_valix.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A8 5320 bytes
SHA-256: c28e39059d9d5d6c10b8818ff27a0c508b2b19a1a60b4a6bb4e8bf4ca2994c36
font_01_sfnt_off0000f5c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C7 10604 bytes
SHA-256: 23bb98ea7777327ba5608ea2a2c612c413aba5dc142820e0e1a58e08cd23f824

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