Malicious PDF — malware analysis report

Static analysis result for SHA-256 709e24da6c7bc182…

MALICIOUS

PDF

81.4 KB Created: 2021-04-26 23:56:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 27a6e1257735af82e8ea7390ff18c583 SHA-1: 9fcbf43da365fde7a7bb8c164fe27f2fd8cdcfb7 SHA-256: 709e24da6c7bc18282636e77a359ea109b1cc4eb2901dae1d67125ade326b33b
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 0.9957

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://jacksth.ru/strik?utm_term=pelco+spectra+iv+manual+espa%25C3%25B1ol PDF link annotation
    • http://itayoga.space/bijorixfrch.pdfIn PDF document text
    • http://linefofaxugedu.mywebcommunity.org/la_vida_es_sueo_cervantes_virtual.pdfIn PDF document text
    • http://ratixopawem.mypressonline.com/cancer_espinocelular.pdfIn PDF document text
    • https://cdn.sqhk.co/xaranoraf/iaWDJji/tame_impala_lonerism_zip_vk.pdfIn PDF document text
    • http://1offpark.xyz/97364580223q9j1q.pdfIn PDF document text
    • http://idealica-italiaoficial.site/iphone_remix_ringtone_zedgexehtp.pdfIn PDF document text
    • http://bighome.space/begodanexujujanexew5iy4m.pdfIn PDF document text
    • http://zotikarida.medianewsonline.com/asymptote_rules.pdfIn PDF document text
    • http://xekalabaxuv.medianewsonline.com/53086135616.pdfIn PDF document text
    • http://tufuwavaziga.mygamesonline.org/que_son_los_chakras.pdfIn PDF document text
    • https://cdn.sqhk.co/duxajoje/KPFgMij/beach_buggy_racing_mod_apk_hack.pdfIn PDF document text
    • http://physcoo.com/hacker_mask_walmart_canadaukqz7.pdfIn PDF document text
    • https://mobibokosivu.weebly.com/uploads/1/3/1/8/131856519/netifazegoxavixifob.pdfIn PDF document text
    • https://visorupa.weebly.com/uploads/1/3/5/3/135305290/xenedul.pdfIn PDF document text
    • https://tusosalowikos.weebly.com/uploads/1/3/1/4/131453146/lesen-fawukov.pdfIn PDF document text
    • http://tufodudem.mypressonline.com/29059973092.pdfIn PDF document text
    • https://cdn.sqhk.co/lukulugere/dhalhjg/60662276305.pdfIn PDF document text
    • https://cdn.sqhk.co/tosilura/CaLbijx/flip_a_coin_100_times_java.pdfIn PDF document text
    • https://muwivagejexe.weebly.com/uploads/1/3/1/3/131379070/vabidisejo_gepiki_pezazaritebi_jelepob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vobozezojip.onlinewebshop.net/les_aliments_riches_en_zinc.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/kigadinazuzi.pdfIn PDF document text
    • https://s3.amazonaws.com/tamobalasu/85818385251.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/89829061558.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/14341304188.pdfIn PDF document text
    • http://juwukopegonamu.onlinewebshop.net/82111124019.pdfIn PDF document text
    • http://jezevenakos.myartsonline.com/aegon_life_term_plan_brochure.pdfIn PDF document text
    • https://s3.amazonaws.com/wibadinavosunom/zoxobuj.pdfIn PDF document text
    • http://kejagabato.myartsonline.com/34217182321.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_off0000fd1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1C 5352 bytes
SHA-256: 7a791984368325a80975d07b6dafcf0eeecf7b260fefa66aa46d6ade71413388
font_01_sfnt_off00010eff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EFF 11416 bytes
SHA-256: 4246f0da080040f9f3a3d91fc0346fdb14fd47c99bfbd6e5ee13cb278236e871

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