Malicious PDF — malware analysis report

Static analysis result for SHA-256 aceae2c0e45da43d…

MALICIOUS

PDF

80.7 KB Created: 2021-03-24 04:18:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 01b5fad0f00ed913f0390be4593a4f5d SHA-1: 338f7b669046b9fc3707d04a970e5985e00f64be SHA-256: aceae2c0e45da43d5697e7462d1a5a187bf5c4cf0060fc2ace825db289ed6d7c
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure, 'https://yafferge.ru/strik'. The document body, though heavily obfuscated, appears to reference a 'Schwinn women's bike', suggesting a lure to disguise the malicious intent. The ML classifier and ClamAV detection strongly indicate malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/strik?utm_term=schwinn+women%2527s+bike+26+inch In PDF document text
    • http://peuly.xyz/77131430942r7gr9.pdfIn PDF document text
    • http://nitanupemil.mygamesonline.org/95039122454.pdfIn PDF document text
    • https://mitamegupep.weebly.com/uploads/1/3/2/3/132302953/4020754.pdfIn PDF document text
    • http://dufazesiz.mywebcommunity.org/66141975954.pdfIn PDF document text
    • http://wonder-ita.fun/majilosaratizisuxu536cf.pdfIn PDF document text
    • https://jepejopik.weebly.com/uploads/1/3/4/6/134610321/e277d17.pdfIn PDF document text
    • http://predouche.xyz/how_to_share_youtube_video_on_twitter_with_previewobqgs.pdfIn PDF document text
    • http://fituxem.sportsontheweb.net/69504136532.pdfIn PDF document text
    • http://gelufose.scienceontheweb.net/albert_einstein_life_story_in_kannada.pdfIn PDF document text
    • https://dozogifelezu.weebly.com/uploads/1/3/4/3/134313369/f92f27c79f7f.pdfIn PDF document text
    • http://dosubodanes.mypressonline.com/pavadilimatem.pdfIn PDF document text
    • http://webmastervlad.ru/47239705783iuhe6.pdfIn PDF document text
    • http://wotidoteked.mywebcommunity.org/resumen_de_el_libro_la_ciencia_de_hacerse_rico.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gekavitominugi.epizy.com/decimals_in_expanded_form_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/wisadawamizigipo.pdfIn PDF document text
    • http://sijadogif.atwebpages.com/modern_automotive_technology_6th_edition_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/63335743198.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/miruzotapamaka.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/10767586373.pdfIn PDF document text
    • http://tawegoju.rf.gd/jutamapedokefuzemajabis.pdfIn PDF document text
    • http://xirofapinowud.atwebpages.com/56294238489.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/alien_colonial_marines_trophy_guide.pdfIn PDF document text
    • http://vofufedufis.rf.gd/37967160393.pdfIn PDF document text
    • http://jijetebum.epizy.com/zuzovibip.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_off0000fddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDB 5420 bytes
SHA-256: 9404f4ab7f8ef36433573cbd1cfe7aa3b2d39a45d75ba72ffd91f51a2d4b604b
font_01_sfnt_off0001104b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1104B 10856 bytes
SHA-256: fea2488844bf2119bd34dd52df1ba182fc6c5040365cc92f061e3836aad2d9c0

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