Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd5acf4440dfb535…

MALICIOUS

PDF

78.4 KB Created: 2021-04-03 19:57:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 762401e3447e8e4661876a9d200f886b SHA-1: b46a9cd326754aed0825fedc623518e660d685cc SHA-256: fd5acf4440dfb53510fc6554ee605f531d8c1bb8703c27be9c9ea12efcf17617
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9991

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 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.
  • 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://botokaw.ru/123?utm_term=desktop+wallpaper+free++cute PDF link annotation
    • https://maviwodoke.weebly.com/uploads/1/3/1/6/131606431/puwumat_wutatavali_ximumetu_nisapaxekavom.pdfIn PDF document text
    • https://xobiduri.weebly.com/uploads/1/3/1/4/131437628/b467bfe5.pdfIn PDF document text
    • https://nijikubu.weebly.com/uploads/1/3/5/3/135347783/157042230de8bf8.pdfIn PDF document text
    • https://mufiguxibetifo.weebly.com/uploads/1/3/1/6/131607440/4400930.pdfIn PDF document text
    • https://gakofalu.weebly.com/uploads/1/3/1/6/131636889/lafifapixekasu.pdfIn PDF document text
    • https://wigewowatabosaz.weebly.com/uploads/1/3/4/3/134352056/kisopuvoteni.pdfIn PDF document text
    • http://wivaserana.mywebcommunity.org/english_test_present_and_past_tenses.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/tateviwewexowop.pdfIn PDF document text
    • http://figimumagoko.mygamesonline.org/52604467817.pdfIn PDF document text
    • http://wutanumijejol.sportsontheweb.net/how_do_you_do_capital_budgeting_tools.pdfIn PDF document text
    • https://dezitatukuti.weebly.com/uploads/1/3/5/3/135389988/finisosofipexo-vejofekasopa-sanosew-mulosovaxapez.pdfIn PDF document text
    • http://gudokav.sportsontheweb.net/90143665824.pdfIn PDF document text
    • https://kupajozowujuz.weebly.com/uploads/1/3/4/8/134881722/edb3a9dc9.pdfIn PDF document text
    • https://kakejomoweva.weebly.com/uploads/1/3/4/6/134674311/nizixap_raxobejoro_malumasebaraf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f493de8f-0535-43ab-8898-39531ff75a4b/cuenta_conmigo_pelicula_online_subtitulada.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/relokipigukot.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/how_to_setup_universal_remote_for_toshiba_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3656b80c-8f0d-48f9-ad00-762966fb4e44/slope_stained_glass_project_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb818d3a-764e-4af8-a973-23903679fedc/hp_officejet_6600_wireless_printing.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/susakokagikowitoxasox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e3b9625-1cf5-4e80-878f-31df827f41df/how_to_change_control_panel_on_kenmore_dishwasher.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/guribofude.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/towuxelilivizuvef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99d21275-0817-4c35-9e6d-4c4e08b77f34/samsung_tablet_ce0168_manual.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_off0000f571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF571 5164 bytes
SHA-256: 46f222d0322abcb425b8aa44cc2c5a5a094cf1ba5537cf37d184da6bdc25fd6a
font_01_sfnt_off0001072f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1072F 10812 bytes
SHA-256: 180a43f40bc2114fd35557326c5b41934ddfba1f704889f104f58d53c9ec664f

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