Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcc8c11ffd63ddb8…

MALICIOUS

PDF

75.9 KB Created: 2021-05-05 06:56:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f8465149357260431f893d14e3dab302 SHA-1: 259be1b5d2daa1f82e70be6719c6cfbfabd09993 SHA-256: fcc8c11ffd63ddb8be649f01e618031e480c1e8be7aee2f586d1fbf3e386508a
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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-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://golowaki.ru/strik?utm_term=plantronics+c052+wireless+headset+setup PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4528959/normal_6026714c496ea.pdfIn PDF document text
    • https://jazawimap.weebly.com/uploads/1/3/5/3/135346256/zawede-suvapo-nareru.pdfIn PDF document text
    • http://sagipidezipe.22web.org/41099321459.pdfIn PDF document text
    • https://lipijubirenazob.weebly.com/uploads/1/3/4/7/134722159/tizimavegupu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417405/normal_6021965571962.pdfIn PDF document text
    • https://tarivoda.weebly.com/uploads/1/3/4/6/134693378/3913158.pdfIn PDF document text
    • http://rimawebonozavi.iblogger.org/p_o_arcadia_deck_plan.pdfIn PDF document text
    • http://rajonilelubej.22web.org/59488039192.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381344/normal_602b773f5bd00.pdfIn PDF document text
    • http://pabobadoxowoti.22web.org/94622226798.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421217/normal_602d8dc79108f.pdfIn PDF document text
    • https://jevejokanidepit.weebly.com/uploads/1/3/0/9/130969277/c11b87fe8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484370/normal_6012419da9ce8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xabuvale.epizy.com/railway_ticket_reservation_form_download.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/ssc_chsl_answer_key_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/17530761362.pdfIn PDF document text
    • http://fubegamo.epizy.com/la_metamorfosis_audiolibro_descargar_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/zudatobu.pdfIn PDF document text
    • https://s3.amazonaws.com/tinezedu/resumen_del_cuento_el_solitario_de_horacio_quiroga.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/aliens_1986_movie_free.pdfIn PDF document text
    • http://zufisad.rf.gd/franchise_agreement_philippines.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_off0000e9bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BB 5652 bytes
SHA-256: cde3ba998db4dc3b0b580f6a154816a7ebf14ce8264a64caf798991c0aa2dc67
font_01_sfnt_off0000fd09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD09 10400 bytes
SHA-256: 5d607156983ed23d5789dac22f1ede11714b56f8384f160e435ef1b392b94cbd

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