Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c3b4e7e241e5950…

MALICIOUS

PDF

88.9 KB Created: 2021-02-28 04:37:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 4857f253e7b7ce5d96056ba8b314a046 SHA-1: 2ea9c9b576462114c9d4e514cdf518a41fffa67b SHA-256: 6c3b4e7e241e5950a6c0c602760d8183489c6b723c4d560e7edf03e4fe59c88d
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating the presence of external URIs. The document body, though heavily obfuscated, suggests a lure related to a 'Maytag wringer washing machine manual'. The embedded URLs point to suspicious domains, likely serving as phishing pages or malware downloaders. No scripts were extracted, but the PDF structure itself is being leveraged to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/wix?keyword=maytag+wringer+washing+machine+manual PDF link annotation
    • http://nazorizuz.medianewsonline.com/10211291112.pdfIn PDF document text
    • https://xalakadumikimam.weebly.com/uploads/1/3/1/4/131437423/mavukesozokewuzo.pdfIn PDF document text
    • http://faxusupovetek.sportsontheweb.net/como_pasar_gramos_a_miligramos.pdfIn PDF document text
    • http://ig-copyrightnotice.com/12850658840q0o4p.pdfIn PDF document text
    • http://ctyr.ru/rise_of_nationalism_in_europe_in_hindi1drjq.pdfIn PDF document text
    • http://pokypka.xyz/what_is_the_value_of_the_smallest_bond_angle_in_xecl4_enter_the_smallest_bond_angle_of_the_molecule93ht4.pdfIn PDF document text
    • http://runmasten.online/little_house_on_the_prairie_the_last_farewell_youtubeq2nei.pdfIn PDF document text
    • http://reduslim-siteofficial.site/beko_self_cleaning_oven_user_manualgfpyp.pdfIn PDF document text
    • https://lotunesu.weebly.com/uploads/1/3/0/9/130969364/8352984.pdfIn PDF document text
    • https://gefetejumifigo.weebly.com/uploads/1/3/4/6/134688955/143612.pdfIn PDF document text
    • http://smartcoin.design/english_comprehension_worksheets_for_3rd_class2tx89.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bavotuvezomevi.myartsonline.com/add_2nd_edition_rangers_handbook.pdfIn PDF document text
    • https://s3.amazonaws.com/bitajemisajoz/facebook_android_file_location.pdfIn PDF document text
    • https://s3.amazonaws.com/mafavuzenoliki/xuxobaxefixijuwozakazan.pdfIn PDF document text
    • https://s3.amazonaws.com/gazitif/its_kind_of_a_funny_story_netflix_uk.pdfIn PDF document text
    • http://geforagegi.atwebpages.com/best_settings_for_mxr_bass_compressor.pdfIn PDF document text
    • https://s3.amazonaws.com/napoledunadigo/zepumimijatonaxixemolel.pdfIn PDF document text
    • http://zupitatip.atwebpages.com/primerica_insurance_prices.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_off000118de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118DE 5412 bytes
SHA-256: 3ba782d0790a4b9d7f0ad571b248e71ca1a0606c001c466f0da293bd211b7e36
font_01_sfnt_off00012b43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B43 13584 bytes
SHA-256: aa6b450a7520c10584d2906c246186f37bccf5ab38882a95ae7a888df25fdaf8

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