Malicious PDF — malware analysis report

Static analysis result for SHA-256 caa499eb199ddb6f…

MALICIOUS

PDF

81.8 KB Created: 2021-03-09 02:23:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 5fc2d4bdc8fc0ae9ea5e517f26d22200 SHA-1: 6301d73c285dac861acf62f23b79a8bf6ccffd18 SHA-256: caa499eb199ddb6f0c4d4733d5f0f96448ea43fb6eda86b9d54bb918d7567000
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one specifically pointing to a domain that appears to be part of a link farm designed to redirect users. The document body, though heavily obfuscated, suggests a lure related to data warehouse architecture, likely to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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 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/aws?utm_term=what+are+the+different+types+of+data+warehouse+architecture PDF link annotation
    • http://samabev.iblogger.org/canon_imageprograf_ipf770_driver.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415937/normal_5ff7d6e737b4e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456398/normal_5ff7cde4e7196.pdfIn PDF document text
    • http://dibosezufo.getenjoyment.net/elements_of_story_writing_ppt.pdfIn PDF document text
    • http://novazeku.mygamesonline.org/que_significa_el_poema_espero_curarme_de_ti_de_jaime_sabines.pdfIn PDF document text
    • http://replyua.site/81544857157c7iee.pdfIn PDF document text
    • http://tusiteguluvora.getenjoyment.net/where_to_get_cpr_aed_certified_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459478/normal_603773d3c06e7.pdfIn PDF document text
    • http://hermidkovo.info/what_streaming_service_has_v_for_vendettak3sy7.pdfIn PDF document text
    • http://xomaweluk.22web.org/jodupalugu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460241/normal_60344d4306b44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470526/normal_5fdc19c49466d.pdfIn PDF document text
    • http://hookup154.site/diabetes_in_pregnancy_guidelines_ukrlq0a.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/b1819e62-0e33-4f90-b6b6-78c95b928ec1/kumizasifevelolutabex.pdfIn PDF document text
    • http://gikumud.epizy.com/eviction_letter_template_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a718df73-01d2-4061-bef4-1b52bff0ffe7/matematicas_financieras_libros_gratis.pdfIn PDF document text
    • https://a581e706-3bf6-41fb-8978-ad4d4077590d.filesusr.com/ugd/afbe6b_66c5822a699a4c008e1fb89ca78aed30.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a2f6c41-cbaa-4d92-a976-13215b38e163/zalidelo.pdfIn PDF document text
    • https://9d50af6f-dbf7-41ba-b854-83985329a12b.filesusr.com/ugd/33c377_5d74c8d2539741f6aec01d64834cfc76.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c99cea8-8ecb-4550-8f2f-bd33a6f059d2/ronapexemozatub.pdfIn PDF document text
    • https://f7cac2f2-528f-490f-9bef-cb2448a877de.filesusr.com/ugd/529ba0_8090514bc1e940c1bd7741423ea6d3cc.pdf?index=trueIn PDF document text
    • http://zasegusof.epizy.com/17621550779.pdfIn PDF document text
    • http://xepuzakudera.atwebpages.com/tom_clancy_book_rainbow_six.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_off0001034d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034D 5420 bytes
SHA-256: 2bc0cc95d24edce10312f07b24ba7033b3cac23c9f27b97390106956ece3181d
font_01_sfnt_off000115d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D9 10348 bytes
SHA-256: 8dcc0470a1b87fc8c42040931edaf2f9d1d1f9057f2b975f28ce3588c7542dae

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