Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a2e208a6ecc673e…

MALICIOUS

PDF

79.3 KB Created: 2021-03-14 11:12:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 11c7d63df5c24cac0dbc90f4392c6735 SHA-1: 51327f1600a8b9c60ec44c0ffc5afd69b02c6ca6 SHA-256: 9a2e208a6ecc673e41db8b0cff092b06c10b8ca191d147bde2735418a0ef1be0
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 0.9995

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://kuzutuzo.ru/wix?keyword=uttering+hills+cave+exit PDF link annotation
    • https://cdn.sqhk.co/zanudiwageg/ifzRji6/basketball_stars_friv_2018.pdfIn PDF document text
    • https://wavamabixalovag.weebly.com/uploads/1/3/4/5/134525364/7046957.pdfIn PDF document text
    • https://xawupaxov.weebly.com/uploads/1/3/4/6/134699297/peneramowapu.pdfIn PDF document text
    • https://posoxoniboje.weebly.com/uploads/1/3/4/7/134713430/6502349.pdfIn PDF document text
    • https://tunoritusaw.weebly.com/uploads/1/3/5/3/135328070/boxubasuw_ripoxam_mesitepuvus_tifam.pdfIn PDF document text
    • https://salofapaj.weebly.com/uploads/1/3/4/3/134314320/74423.pdfIn PDF document text
    • https://cdn.sqhk.co/dekawako/jehaIhb/disemikipitavubufepotube.pdfIn PDF document text
    • https://seduzitatadobi.weebly.com/uploads/1/3/4/3/134371103/linezudemi-sixovapevuveba-jirozujagawug-wolejuwiku.pdfIn PDF document text
    • https://cdn.sqhk.co/tijinujul/f3gu2ij/xekawozowor.pdfIn PDF document text
    • https://cdn.sqhk.co/sedazozesufu/a8ige59/naxun.pdfIn PDF document text
    • https://wuripofowiwafu.weebly.com/uploads/1/3/4/3/134332549/e6f9ae9.pdfIn PDF document text
    • https://vulefewaxamovu.weebly.com/uploads/1/3/3/9/133997320/jomevaronebovosi.pdfIn PDF document text
    • http://ipai.online/10422824979iwmgw.pdfIn PDF document text
    • http://detonic-italy.website/public_health_nursing_population-centered_health_care_in_the_community_9thbgax0.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
    • https://uploads.strikinglycdn.com/files/daf96553-edc1-47eb-965b-028f672b7542/how_to_fix_ice_maker_on_whirlpool_gold_refrigerator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/861193cf-e6a5-4b76-b38b-91d87ab5ede8/the_old_man_and_the_sea_questions_and_answers_quizlet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c08a409e-b576-45ac-b595-4935d05d4e30/how_to_make_a_bean_bag_toss_with_cardboard.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08e39ec2-a58d-488b-9c79-b8f1880da46d/shakespeare_sonnet_116_literary_analysis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3d8032b-b9b2-45c6-8af0-37ce11c8cf30/47198823001.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab242527-739d-4c78-89a0-c12f83c86b6e/why_is_english_composition_important_essay.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a707493f-118f-4a71-a487-6625a56c28df/76619701301.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e5c06bc-a0e2-4fbd-a2fa-b5b6f289cf6b/10049086364.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_off0000ecf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF5 4860 bytes
SHA-256: 34ef112a632d1a8653bdc48a8e58ad0f4e81412c793cfdd01a8dff3e4e48a18e
font_01_sfnt_off0000fd72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD72 10676 bytes
SHA-256: 2011554cc89d046fce068b23af1cff7af0f6a24ace99bb0294cb2e2e745621ed
font_02_sfnt_off000121e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121E9 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e