Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc24002e7d429ee4…

MALICIOUS

PDF

86.1 KB Created: 2021-05-01 10:12:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 60976c766128c26bb521578d38cd0d9b SHA-1: 717124b28e5a8196ca4ab3fb59f5fb16de4a207a SHA-256: fc24002e7d429ee4e8801ec19b1de90d747eccf43bacf305088e61bfb3489b1d
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 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/strik?utm_term=the+leftovers+tv+show+review PDF link annotation
    • http://mnclassis.org/zaxobufamegemufomono22rf4.pdfIn PDF document text
    • https://cdn.sqhk.co/fujotojaxob/jithbLI/11256782787.pdfIn PDF document text
    • http://lg-copyright.com/3316893410xdjx2.pdfIn PDF document text
    • http://gprofights.ru/jumpers_knee_pain_at_nightmkujk.pdfIn PDF document text
    • http://trynutra.shop/graphing_parallel_and_perpendicular_lines_worksheetf6t50.pdfIn PDF document text
    • http://gefosezidubajoz.scienceontheweb.net/canon_pixma_mg5320_wireless_inkjet_photo_all-in-one_printer.pdfIn PDF document text
    • http://pusatokolerax.mywebcommunity.org/74283847387.pdfIn PDF document text
    • http://devivitonewe.sportsontheweb.net/pabubodo.pdfIn PDF document text
    • http://arendaavto.taxi/66357435816po71z.pdfIn PDF document text
    • http://digitalliteracyinstitute.com/caffeine_for_pc0p4fl.pdfIn PDF document text
    • http://jesofoma.getenjoyment.net/31383906443.pdfIn PDF document text
    • https://cdn.sqhk.co/mopewedote/bheXkjb/voice_actor_quiz_questions.pdfIn PDF document text
    • http://wiramegat.22web.org/bhagavad_gita_in_kannada_free_download.pdfIn PDF document text
    • http://xenogejewaruvi.22web.org/pumexoxenupuga.pdfIn PDF document text
    • http://suberubepuparo.getenjoyment.net/what_is_ontology_and_epistemology_in_research.pdfIn PDF document text
    • http://latofolakop.22web.org/xidejagitiwedabosewesi.pdfIn PDF document text
    • http://negifowutagur.mygamesonline.org/85763960207.pdfIn PDF document text
    • http://tizezs.xyz/lumimasudenifaxuzomodyktpp.pdfIn PDF document text
    • https://cdn.sqhk.co/bavisimupux/ihjZA84/11123156482.pdfIn PDF document text
    • https://cdn.sqhk.co/nasubivapu/jjAmApu/tatabitufiwevomujazedude.pdfIn PDF document text
    • http://cardio-natural.info/should_i_use_audacitycl4bq.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://davinawoguzag.atwebpages.com/23056952916.pdfIn PDF document text
    • http://wazuvit.rf.gd/70102735805.pdfIn PDF document text
    • http://dimizisunope.epizy.com/6th_grade_math_vocabulary_words.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_off000113c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113C1 4744 bytes
SHA-256: 6cd4b358ef2720747b113ca37301768a8e2a4438ece4198a49df9f51c4b86c48
font_01_sfnt_off000123f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123F6 11456 bytes
SHA-256: 3868b66f27f3f6fc25cf74ae71053c92f52a82b5fdfe5e7ecae929dcd6a8191b

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