Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c6a7a81ad310dd9…

MALICIOUS

PDF

125.9 KB Created: 2021-03-17 20:46:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 0056aee360a174ff3737a7d928c5666b SHA-1: c49244041f555735b4f9ef4798556aeae5205955 SHA-256: 9c6a7a81ad310dd970bd0f6a30e4befda61cc5d1a8abdd9e633442e011da96a5
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are SEO-optimized PDF documents, as indicated by the PDF_SEO_LINK_FARM heuristic. The primary malicious URL identified is 'https://leonvi.ru/wix?keyword=westgate+gatlinburg+tv+guide'. While no scripts were explicitly extracted, the presence of a link farm and the ClamAV detection suggest a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://leonvi.ru/wix?keyword=westgate+gatlinburg+tv+guide PDF link annotation
    • http://pazefezos.mywebcommunity.org/kivowikusugudagubalug.pdfIn PDF document text
    • http://begdas.space/omnifilter_u25_manualovqp5.pdfIn PDF document text
    • http://justamorem.com/21105898650cov4w.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/d092ed0d-d811-402f-8deb-1b26e942dbc6/thermo_king_service_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61a3af59-ca87-430a-a91e-dac4856bcad3/41703258755.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/72520466325.pdfIn PDF document text
    • https://s3.amazonaws.com/nevowimo/free_lagu_chrisye_pergilah_kasih.pdfIn PDF document text
    • https://36535336-4f9e-4c0a-b1ad-3385cb5d4299.filesusr.com/ugd/15ebe2_19f5f3be46df41bbaf9f5cccc3c21ce7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a07bf921-5c29-4a57-a86f-d0a37bc511de/ruvowigalusaxunetogotedo.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/quote_template_for_website_design.pdfIn PDF document text
    • http://perexuwofogefo.onlinewebshop.net/73700302938.pdfIn PDF document text
    • https://6f8cb219-4830-455d-9ced-b55e65700e85.filesusr.com/ugd/fd30ac_42ef4ddb5d2647cb809dd56578f6355e.pdf?index=trueIn PDF document text
    • https://60f6da8c-824c-4163-aae9-6195f2ac7ed4.filesusr.com/ugd/7f16bd_f6364286df0045e8836980fb1a257552.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/30898564-0c2d-4547-acba-01cb2a384723/is_turtle_bay_resort_all_inclusive.pdfIn PDF document text
    • https://c83cbd6e-a134-4b49-ba12-49f24c654ad9.filesusr.com/ugd/904a8b_b8d069ffaf224b87b78938b2b4d8396f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nemafu/como_se_dice_recolectar_datos_en_ingls.pdfIn PDF document text
    • https://6a1e2a5f-c456-4288-b9d5-5378f87870fb.filesusr.com/ugd/076fac_b762666ccccb482db86376ee1d056951.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2e78f5e-4da7-4ee4-948c-41cd9a2ea975/the_chocolate_touch_book_cover.pdfIn PDF document text
    • https://s3.amazonaws.com/mipizaju/97612305698.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/pupesowamiluzo.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_off0001b1ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B1AE 5208 bytes
SHA-256: 88d94f1c92cae8791b8442a7917b88e33eccfb3edb002162961dc0ae9a311fe1
font_01_sfnt_off0001c380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C380 11904 bytes
SHA-256: 639ca3cf1d431405a97b08a5e75db7cc1143066954488b239309b01df1d6f5fd

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