Malicious PDF — malware analysis report

Static analysis result for SHA-256 270caf2b52919cc8…

MALICIOUS

PDF

83.1 KB Created: 2021-03-16 06:26:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: b5a28b7af4619a9253b955227fd3ef8e SHA-1: 2997644d2477b0453cb6a462260bd367eea4b027 SHA-256: 270caf2b52919cc816eac54229c7b9081fcaf90d1512b782b03208fbfdd121e0
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, directing users to various PDF files, many of which are hosted on unknown domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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://golowaki.ru/wix?keyword=race+writing+strategy+practice+pdf PDF link annotation
    • http://jarevine.mywebcommunity.org/fofobifitowexididatavez.pdfIn PDF document text
    • https://cdn.sqhk.co/dexujagafir/egchggf/fukopovok.pdfIn PDF document text
    • http://pagavopalubutu.scienceontheweb.net/15904002428.pdfIn PDF document text
    • http://mikovil.mywebcommunity.org/biology_notes_for_class_10_chapter_wise.pdfIn PDF document text
    • https://cdn.sqhk.co/xonipavu/hajchaR/sports_maxx_eyes_of_heaven.pdfIn PDF document text
    • https://cdn.sqhk.co/wufotubi/igvhcip/58064201835.pdfIn PDF document text
    • https://cdn.sqhk.co/ragekasa/gjbgfhj/laxekevu.pdfIn PDF document text
    • https://cdn.sqhk.co/jabisopomuxo/ZEgf8jj/cool_remix_songs_clean.pdfIn PDF document text
    • https://cdn.sqhk.co/pilimisoduk/Dtljeja/dhoom_3_full_movie_part_1.pdfIn PDF document text
    • http://gexopidikimo.mygamesonline.org/high_fodmap_foods_to_avoid.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/roware/broker_agreement_template_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/15513473547.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/88227643680.pdfIn PDF document text
    • https://2dcb0092-dd22-4cef-90c1-8c398f802bb7.filesusr.com/ugd/ff3115_938bbdbe7f754cef87feab0a9f7de1f2.pdf?index=trueIn PDF document text
    • https://ff9dba89-6132-4485-99c2-ace8a2453124.filesusr.com/ugd/c3f59f_c4d6bd58a4bd40fc9bc462aac69d9a32.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/60743841477.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/23797917776.pdfIn PDF document text
    • https://1ebfeea1-7d02-43b8-8f0a-002c87bc7f75.filesusr.com/ugd/50dcf6_eda28d93f2524a0b861e1efbcb507fd4.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/air_pollution_control_engineering_ebook_free.pdfIn PDF document text
    • https://s3.amazonaws.com/lanaladu/amado_mio_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/zozuxukoxo/whatsapp_free_for_desktop.pdfIn PDF document text
    • https://167c8e7b-8160-49a2-a88e-f26749d647c8.filesusr.com/ugd/1ad47d_8b2fd98dfde545afae27e2affec4d3da.pdf?index=trueIn PDF document text
    • https://45dcde1a-aed5-4138-b95e-a0f768a283bf.filesusr.com/ugd/89441e_ab42d2e068b34e9bad2e3a5408c29a27.pdf?index=trueIn 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_off00010244.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10244 5492 bytes
SHA-256: cc2ab12eaac29a48002822a309ddcb564b3ba22d5643fdfea96d7dba5d77b7aa
font_01_sfnt_off00011523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11523 12540 bytes
SHA-256: c883e07f3d7a72ca9c1c7507c10d75419622ca14024317436327af8b65d36e6c

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