Malicious PDF — malware analysis report

Static analysis result for SHA-256 9da99709298d90fc…

MALICIOUS

PDF

72.0 KB Created: 2021-03-23 02:14:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c6db1ca9755c5aed3a673cb18221e753 SHA-1: 2fb01d00ebbf1c0a472f201eea1d8417e9b58671 SHA-256: 9da99709298d90fc2ded00cc6b488e4590ea30e58c47e3453b0c0da65e6190f3
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 0.9998

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://xezojetit.ru/wix?keyword=osprey+pixel+port PDF link annotation
    • https://gifenatewa.weebly.com/uploads/1/3/4/4/134480542/napujimogasu.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/dSpmdXW/barbie_dreamhouse_adventures_season_4_episode_25.pdfIn PDF document text
    • https://supavutoni.weebly.com/uploads/1/3/4/7/134713891/2681880.pdfIn PDF document text
    • https://cdn.sqhk.co/jigekuragige/XMJRugj/jutatuvarekezepofezenevo.pdfIn PDF document text
    • https://mutevoleronuxo.weebly.com/uploads/1/3/5/3/135351112/lagakakeloremaweku.pdfIn PDF document text
    • https://danikobunib.weebly.com/uploads/1/3/4/7/134755608/b832275eaca6.pdfIn PDF document text
    • https://cdn.sqhk.co/sabiseleto/aW5vid7/blazetv_promotion_code.pdfIn PDF document text
    • https://cdn.sqhk.co/dogojaseziwo/XPyigiC/android_one_vs_android_8_oreo.pdfIn PDF document text
    • https://dafizigupiteg.weebly.com/uploads/1/3/4/4/134492389/3776529.pdfIn PDF document text
    • https://cdn.sqhk.co/pivugituxi/aYiihgA/brand_management_definition_kotler.pdfIn PDF document text
    • https://cdn.sqhk.co/xubuzivo/eWEjcja/sipoc_analysis_template.pdfIn PDF document text
    • https://dovezoluwebib.weebly.com/uploads/1/3/4/0/134017866/2354891.pdfIn PDF document text
    • https://bigakajufejala.weebly.com/uploads/1/3/4/2/134265656/eeb94718fb15.pdfIn 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://widifusi.myartsonline.com/how_to_write_sentences_3rd_grade.pdfIn PDF document text
    • http://vesedakowata.onlinewebshop.net/loxol.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/bulojuno.pdfIn PDF document text
    • https://s3.amazonaws.com/dudigonifu/ludis.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/wuzuwebefofu.pdfIn PDF document text
    • http://jabejanaboz.atwebpages.com/when_i_met_you_quotes.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0B4 4480 bytes
SHA-256: 0a2ea707cc1e840205bd148b4768e69b7ae3df1dbe50efdd283059745abdbb15
font_01_sfnt_off0000e00e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00E 10836 bytes
SHA-256: 3c8f0260bb523f8c78e98b33b8d57bc0e5e5c98f8154604466796a494720bace
font_02_sfnt_off0001054d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054D 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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