Malicious PDF — malware analysis report

Static analysis result for SHA-256 90c1d69dd755f4c3…

MALICIOUS

PDF

94.5 KB Created: 2021-03-14 12:00:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0a3c7fc472852e0c8d1fab2a650765ae SHA-1: d90a19d9f9a9d6ccbd25946122dfc0aa0205896d SHA-256: 90c1d69dd755f4c31b2df228b3d8bc01ef8b2f3100c980178ff7cff7e2d2a837
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 0.9991

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=scag+tiger+cub+seat+cushion PDF link annotation
    • https://cdn.sqhk.co/xovujiroveg/cEAhpVm/definition_hit_the_glass_ceiling.pdfIn PDF document text
    • https://binamakizixevuj.weebly.com/uploads/1/3/2/8/132814618/1afa4aefb77.pdfIn PDF document text
    • http://rejemezurufoveg.mywebcommunity.org/wideralogen.pdfIn PDF document text
    • https://cdn.sqhk.co/resilano/JhbQJhh/best_n95_face_masks_made_in_usa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465012/normal_5ff0d81daddf1.pdfIn PDF document text
    • http://warixedivukinat.mygamesonline.org/2012_jeep_grand_cherokee_srt8_0-60.pdfIn PDF document text
    • https://bojibelatos.weebly.com/uploads/1/3/4/0/134040608/lejizuseniba.pdfIn PDF document text
    • https://cdn.sqhk.co/zebenane/dibRCvs/jowisidu.pdfIn PDF document text
    • https://cdn.sqhk.co/zifeduwa/jdQHZdi/91922288880.pdfIn PDF document text
    • https://cdn.sqhk.co/mibuguxinise/5EhhsMP/diba_true_shoes_reviews.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368495/normal_5fdf00647b007.pdfIn PDF document text
    • http://luzupogakij.sportsontheweb.net/42986062256.pdfIn PDF document text
    • http://sadinexiwa.mygamesonline.org/english_grammar_check_app.pdfIn PDF document text
    • http://paxosij.mygamesonline.org/what_does_it_mean_when_you_say_ride_the_tiger.pdfIn PDF document text
    • http://gakagebir.mypressonline.com/what_is_skin_so_soft_good_for.pdfIn PDF document text
    • http://vekisonoloze.sportsontheweb.net/intex_18x52_ultra_frame_pool_parts.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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://merapenerabari.myartsonline.com/caballo_de_troya_tomo_1.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/akuntansi_sebagai_sistem_informasi_sma_ppt.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/finalipiwewedudareli.pdfIn PDF document text
    • http://jubogaju.atwebpages.com/eloge_de_l_amour_alain_badiou.pdfIn PDF document text
    • https://s3.amazonaws.com/nitatotol/best_number_theory_books.pdfIn PDF document text
    • http://vilumepidiwego.myartsonline.com/hotpoint_gas_stove_pilot_light.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011aee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AEE 1740 bytes
SHA-256: a68cceacf3ce7571a242444416b09343b5c30eabbbccbbd95a3dbe2a5d942afd
font_01_sfnt_off00012370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12370 5156 bytes
SHA-256: 778cb95054b8f9068e812388dd8e7088b2f601c7800072f1c2d1cd7e98c03cd2
font_02_sfnt_off000134e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134E2 11884 bytes
SHA-256: 73a0a6c22e2617e1bab11172350dec9aa602c744d65adde172f200870ba968fc
font_03_sfnt_off00015ccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CCB 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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