Malicious PDF — malware analysis report

Static analysis result for SHA-256 b786d6bb5a4b6305…

MALICIOUS

PDF

76.7 KB Created: 2021-04-06 04:53:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: fc2425c29669e55050be749f62dc668a SHA-1: b89f0f6a4b301fccbd6549b4cb4e577b5244ad7b SHA-256: b786d6bb5a4b63052e5eaf6a52519f31dfc59b29d32569e00d132bbeb9da7c5b
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 0.9997

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 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://jottigo.ru/strik?utm_term=braun+series+7+wet+%2526+dry+shaver+review PDF link annotation
    • https://lerivifaladadov.weebly.com/uploads/1/3/4/3/134334847/sinosunevos.pdfIn PDF document text
    • http://delabozaxexiris.getenjoyment.net/fexem.pdfIn PDF document text
    • https://dobabolomibela.weebly.com/uploads/1/3/2/6/132681713/jolevebufebep-jorovezekabalev-nudeluvakuxi-sixukofuxobo.pdfIn PDF document text
    • http://xugilerasifoveg.22web.org/pulonujopikonagumajuvabe.pdfIn PDF document text
    • http://pojapir.mygamesonline.org/amls_2020_2da_edicion.pdfIn PDF document text
    • https://toruvorunivigu.weebly.com/uploads/1/3/5/3/135317855/d0719.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lofoxos.epizy.com/ganigisutakubu.pdfIn PDF document text
    • http://rimutapewite.rf.gd/seventeen_heathers_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/monitoji.pdfIn PDF document text
    • http://lilaxeluven.epizy.com/6691767652.pdfIn PDF document text
    • http://bafovupopevepus.epizy.com/gafosujokefid.pdfIn PDF document text
    • http://bezegorev.epizy.com/tamilrockers_attu_tamil_movie_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/64385313014.pdfIn PDF document text
    • https://s3.amazonaws.com/bewibiwat/57548899130.pdfIn PDF document text
    • http://widifusi.myartsonline.com/the_age_of_reason_begins.pdfIn PDF document text
    • http://bupujipa.epizy.com/rufuwixukominus.pdfIn PDF document text
    • http://bowubibegejojop.rf.gd/eamcet_maths_formulas_download.pdfIn PDF document text
    • http://kamegil.epizy.com/best_home_coffee_makers_consumer_reports.pdfIn PDF document text
    • http://daxokefi.epizy.com/imran_khan_speech_in_un_general_assembly_in_urdu.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/19329753812.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_off0000e37b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE37B 4868 bytes
SHA-256: f71a6cfcaa176024414cbb0db48c19cde23457ecfa9e7ba933884e482b9d26b1
font_01_sfnt_off0000f42c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF42C 15556 bytes
SHA-256: 5530edd4fedcb7696f313eddffddb7f9da4f3e005695aaefb9ff2baaae282cd1

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