Malicious PDF — malware analysis report

Static analysis result for SHA-256 378d2b2f76bd6250…

MALICIOUS

PDF

79.8 KB Created: 2021-03-26 09:37:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: cf0f2299f45f0d1bc9e7d376fb69eb71 SHA-1: 43de5eee8c05e9ee11be350a3f55539c2dafaa1d SHA-256: 378d2b2f76bd6250e27a17d7912f358b1250daa762d1d92701a844b0210193ac
94 Risk Score

Malware Insights

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

The PDF document contains embedded links and is flagged as a potential invoice or payment lure. The ML classifier strongly indicates maliciousness. The presence of external URIs and the 'SE_INVOICE_LURE' heuristic suggest a phishing attempt to trick the user into visiting a malicious website, likely to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://lozipotod.ru/wix?keyword=hercules+worksheet+quizlet PDF link annotation
    • http://kovatafob.mypressonline.com/ponajoniwonafedinugakunew.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/where_is_the_furnace_filter_on_a_goodman_furnace.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391634/normal_604a94f1e3883.pdfIn PDF document text
    • https://kusudojisopev.weebly.com/uploads/1/3/4/7/134774064/7d655117e751.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484820/normal_603f3a2595bd2.pdfIn PDF document text
    • http://tetizeniwa.mypressonline.com/biosurfactant_producing_bacteria.pdfIn PDF document text
    • http://midakurapujif.mypressonline.com/gutizudikixulugak.pdfIn PDF document text
    • http://tufodudem.mypressonline.com/zusok.pdfIn PDF document text
    • http://wotukujis.sportsontheweb.net/attrition_analysis_report.pdfIn PDF document text
    • http://vobasexukux.iblogger.org/mathe_bungen_bruchrechnen.pdfIn PDF document text
    • https://xorizelipuv.weebly.com/uploads/1/3/1/6/131637744/1b3ba731043c4ae.pdfIn PDF document text
    • http://danoguvokapijof.medianewsonline.com/brazing_vs_welding_vs_soldering.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470533/normal_5fdbe7256474f.pdfIn PDF document text
    • https://kazubuxupopa.weebly.com/uploads/1/3/2/6/132696048/jisogegexu.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://lozadubevapoke.epizy.com/third_eye_blind_jumper_song.pdfIn PDF document text
    • http://sonarubitexo.atwebpages.com/58033098539.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/aleluia_cohen.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/excel_format_cell_as_text.pdfIn PDF document text
    • http://womidelere.myartsonline.com/b._ed_result_2020_kuk.pdfIn PDF document text
    • http://fomobiwudaz.rf.gd/naludovaledi.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/how_to_charge_shibari_mini_halo_wand_wireless_20x.pdfIn PDF document text
    • http://dufuvebali.rf.gd/pagipipapekumigavexive.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC7 4744 bytes
SHA-256: 1e45be2cd93a47ebe60b64781201df2e0b4449c0dbb942f2cd5d3bc5de26ae9b
font_01_sfnt_off0000ff19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF19 10680 bytes
SHA-256: 3c698665061d23d9ffb57579cc5567d206bc3ec05dc18c026dfea6672d2988c3
font_02_sfnt_off000123c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123C4 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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