Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea416a208240198e…

MALICIOUS

PDF

80.0 KB Created: 2021-03-15 11:28:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7fb8419f753bc9c9f2f5e083a9dd9b1e SHA-1: 5a94e522a20c011d491a9b22cbc3921d13c212c3 SHA-256: ea416a208240198ee4e82d43a875339be6ded7e4eb43468293ac63639f72b95a
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 0.9990

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://nipisod.ru/strik?utm_term=the+best+daws+for+beginners PDF link annotation
    • https://buwipifigidorip.weebly.com/uploads/1/3/0/8/130813409/39cb774647.pdfIn PDF document text
    • https://xanuvewetarew.weebly.com/uploads/1/3/4/7/134732967/wagoru.pdfIn PDF document text
    • https://temadugebunexi.weebly.com/uploads/1/3/1/8/131871621/4790721.pdfIn PDF document text
    • https://pixipemojawipe.weebly.com/uploads/1/3/4/4/134459682/jojired.pdfIn PDF document text
    • https://vufevilasok.weebly.com/uploads/1/3/4/3/134314299/5308a6ad6193d8.pdfIn PDF document text
    • https://mokoxobijukox.weebly.com/uploads/1/3/4/3/134321678/jozavarunusasavanari.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
    • https://4f0754e2-f0c4-47db-826b-83042027646c.filesusr.com/ugd/7a11b0_0207279fcb174dd7bd36c86a71d991c0.pdf?index=trueIn PDF document text
    • https://8f20b4bd-83f7-4a55-8c6f-e9501e2e061c.filesusr.com/ugd/c1c462_27c0813785e448e39cb1589866924947.pdf?index=trueIn PDF document text
    • https://69c5641f-197a-42c1-bef1-daa502c1f1d7.filesusr.com/ugd/948cea_cacb71e753e4471089f9e7b8da7ec722.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d20656a5-7eda-4d0c-88c9-65721384e4a1/32171256532.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abdf4841-c07b-480f-b815-d167247f20da/23922791625.pdfIn PDF document text
    • https://59bb578d-b312-442a-858b-1a1a54b18a6c.filesusr.com/ugd/c79b1c_2f79b7968b354cd186a5294f787aa90e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec7a4583-c1fa-45f2-b325-1ae3eda71cc3/the_man_in_the_high_castle_ending_season_2.pdfIn PDF document text
    • https://b54663a3-ff9d-4122-b75c-69b71428c9b0.filesusr.com/ugd/cfa91a_847747a53aba463d853cfc3cdd53d498.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mexavofezoxi/teori_biogenesis_dan_abiogenesis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e268a2b-e0f9-49b3-8cc2-371a56f9e535/how_to_write_rebuttal_paragraph_in_essay.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/juregemo.pdfIn PDF document text
    • https://c22e5cf4-338a-4003-9cad-c1cb0be29285.filesusr.com/ugd/3db607_5c964563f81545d59adc5c12ab619b22.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/capitalismo_informacional_resumo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b2cd5fb-861f-4217-843a-9a2b5b1198aa/92918267420.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/42197888375.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/main_khiladi_tu_anari_song_bestwap.pdfIn PDF document text
    • https://bd7a0a6f-bbfd-49cc-ba41-c3f2778102d9.filesusr.com/ugd/9ea91e_0800aaac5f304929a8f67d23e05a5f97.pdf?index=trueIn PDF document text
    • https://e1318bff-d970-45e2-bcea-45481503a18b.filesusr.com/ugd/75a96d_3ab675fb1aee4fcba0e6c7b1a5db73ed.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE0F 5104 bytes
SHA-256: 94ae484d16ed5f6896636e8e33e8a30dfb67304a1134524ed9d14596457334d3
font_01_sfnt_off0000ff73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF73 10928 bytes
SHA-256: 21992c20e822b23439793704e782b078295d333b90984c26e40f461f6c385270
font_02_sfnt_off0001246d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1246D 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2