Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebf868e249df1704…

MALICIOUS

PDF

82.6 KB Created: 2021-03-24 16:00:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a3c1bd828db804760d5b205de382c168 SHA-1: 5cd0eb407824de45a0d8daaf530d08104f38af13 SHA-256: ebf868e249df1704851fd0808d5c0d063fea55c08659adb053d857caa1d03674
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/award?keyword=introduction+to+world+religion+and+belief+system+pdf PDF link annotation
    • https://dukagalirizaz.weebly.com/uploads/1/3/1/8/131856141/mupewoxa-nuvivojalaru-nidateberib-mizetawokor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388163/normal_5ffac11498abb.pdfIn PDF document text
    • https://nukogakulezov.weebly.com/uploads/1/3/1/3/131378840/nedadabogiriruz.pdfIn PDF document text
    • http://sopugepibimel.mypressonline.com/lamovuzajoreronitotejov.pdfIn PDF document text
    • http://jokojujut.medianewsonline.com/autor_del_libro_curso_de_milagros.pdfIn PDF document text
    • http://gofadivus.mygamesonline.org/how_to_replace_oven_door_glass_kenmore.pdfIn PDF document text
    • https://foworagajiwodim.weebly.com/uploads/1/3/0/9/130969946/fuxememisofugo-peluwevuru.pdfIn PDF document text
    • http://powuvomewekuxeb.getenjoyment.net/estadistica_para_administracion_y_economia_anderson_10.pdfIn PDF document text
    • http://lagejarejitog.mypressonline.com/79686893500.pdfIn PDF document text
    • http://netolenogafa.getenjoyment.net/how_do_sharks_defend_themselves.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461207/normal_5fe6f0be91f4f.pdfIn PDF document text
    • https://fapopadiwa.weebly.com/uploads/1/3/1/4/131438416/7815802.pdfIn PDF document text
    • http://folejaf.mypressonline.com/wings_of_fire_graphic_novel_1_preview.pdfIn PDF document text
    • https://domazatavaxagit.weebly.com/uploads/1/3/0/7/130775902/6985194.pdfIn PDF document text
    • http://ritixibetono.mygamesonline.org/78624880004.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/what_does_tcp_ip_mean_in_computer_terms.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/27362920839.pdfIn PDF document text
    • https://2061f665-9309-41a6-981d-137229ee7e60.filesusr.com/ugd/eb2fe6_7e4955a248054e7b8b6bdf0fdb9daac7.pdf?index=trueIn PDF document text
    • https://fa5d8e44-005d-4c05-925d-ba60cb7f5023.filesusr.com/ugd/121e37_d10e1b69a1e5414ca6b4e93fb3644e6f.pdf?index=trueIn PDF document text
    • https://7ae52be2-ba3c-41fb-8935-29281088223e.filesusr.com/ugd/affaa6_2468986a6a1249d7a103c1c114f73f3a.pdf?index=trueIn PDF document text
    • https://9305c775-266c-4126-9ef9-90a5cffee957.filesusr.com/ugd/c3f88d_253182a9757a4b55aaa4363c5482c2d5.pdf?index=trueIn PDF document text
    • http://nobapizasiwe.myartsonline.com/calidad_de_vida_bienestar_y_salud.pdfIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/32677181445.pdfIn PDF document text
    • https://s3.amazonaws.com/gomakobez/cuantos_centimetros_es_1_metro_cuadrado.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_off000104c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C2 5744 bytes
SHA-256: b9bbbf6545ae684d452ffa1bf62bd33d250eaba15913ae674cf1b9821e040096
font_01_sfnt_off00011854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11854 10680 bytes
SHA-256: a7198669acf314e683332e89685af5d99ca9512a16bf42276f919e32698900be