Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd3ca46198dfdbe6…

MALICIOUS

PDF

91.6 KB Created: 2021-04-03 09:22:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a9ff1a824560ca86b27a83948a6d393b SHA-1: c9cd4dbb2ddb9bc04cda8d9e1c3986b761683375 SHA-256: dd3ca46198dfdbe6b2eb38077d0183870aaeeb8e36c1a661923fc19282e9df71
96 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating an embedded external URI and is flagged by a machine learning classifier and ClamAV as malicious phishing content. The document body, though heavily obfuscated, appears to be a lure related to appliance repair, directing the user to a suspicious URL. No scripts were extracted, but the presence of external links suggests an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xajibur.ru/strik?utm_term=how+to+bypass+the+lid+switch+on+a+whirlpool+cabrio+washer PDF link annotation
    • http://dixojele.22web.org/2006_ford_6.0_powerstroke_oil_filter.pdfIn PDF document text
    • http://tomolijoponix.mypressonline.com/violin_beginner_book_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489596/normal_60222d528337b.pdfIn PDF document text
    • http://folugomobok.getenjoyment.net/biometrics_security_system.pdfIn PDF document text
    • http://raxotigorev.22web.org/luvojan.pdfIn PDF document text
    • http://rutefozur.22web.org/dabidugedoneb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446491/normal_601eca81b457d.pdfIn PDF document text
    • http://zigapajuxijado.mywebcommunity.org/ncert_class_10_physics_textbook.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467979/normal_60270d6628e60.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/6c964001-c77c-40bd-ae31-9bcbb1884db6/how_to_clean_filter_samsung_vrt_steam_washer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c439ba9d-756b-489b-9034-541ed158b09f/xofatubitoxoxusifesidila.pdfIn PDF document text
    • http://kisidop.rf.gd/seismic_waveform_dataset.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/gidezo.pdfIn PDF document text
    • http://rakikazava.rf.gd/android_tv_os_8._1.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/handlebars_template_date_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb2536c2-cc95-4b02-9d09-523fd7bcec56/kenmore_600_series_dryer_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zupenafud/les_miserables_movie_amazon_prime.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/2017_honda_civic_type_r_performance_parts.pdfIn PDF document text
    • http://jidojig.epizy.com/dapov.pdfIn PDF document text
    • http://foduvikedumule.rf.gd/vafalugi.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/bodyguard_movie_free_for_pc.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_off00012522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12522 5456 bytes
SHA-256: 38052fbd98ecb7a8e3298f6b7967ad468e512789ea1ca0f946d47c84b62a8193
font_01_sfnt_off000137b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137B1 12076 bytes
SHA-256: a6eacdb4a23ee03229ae6031fc848297c96e982b456bd4e199afd0c8221ddad7

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