Malicious PDF — malware analysis report

Static analysis result for SHA-256 b28d4ffa6b1ed1dc…

MALICIOUS

PDF

241.3 KB Created: 2021-04-01 05:53:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 839c68ab3f1794242e5869b53ab9cf4e SHA-1: 185c7a1024d2bc60c62b65a5ff17d17250063a10 SHA-256: b28d4ffa6b1ed1dce13e686a36da669985d3da98ee45b8a94c4da2fae275ab99
136 Risk Score
Tags
free-cdn-ebook-manual-lure

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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://xezojetit.ru/strik?utm_term=onn+dvd+player+ona18dp001+troubleshooting PDF link annotation
    • http://arbitestpark.xyz/zixitzuig4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413862/normal_60033b8c2edf8.pdfIn PDF document text
    • https://cdn.sqhk.co/baziwuwe/ejjghhb/just_dance_now_not_loading_on_iphone.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410204/normal_5ffab046acd4d.pdfIn PDF document text
    • https://cdn.sqhk.co/nuwalimo/Jcnhejf/bonuxidiwixutatudupe.pdfIn PDF document text
    • https://cdn.sqhk.co/vopupevomate/Xheenji/real_racing_3_mod_apk_ios_2020.pdfIn PDF document text
    • http://lifeshop.pro/61351296709xszh0.pdfIn PDF document text
    • https://cdn.sqhk.co/zetanitanedo/h1Jjcja/tivuzakekevuguwuxofe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420761/normal_5fc87ac914eb7.pdfIn PDF document text
    • http://gaydating.world/yamaha_psr_640_manual7eb4i.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://66f9c2bc-82a6-463d-9ccd-9c94d3d8805e.filesusr.com/ugd/b361c6_dfeaa69ea9e0443f999dbbb11f916cca.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kotidox/gozazodazojulurevodepe.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/vedefedekorerume.pdfIn PDF document text
    • https://21e323bd-7fdd-46e9-a6c7-4880e76d7610.filesusr.com/ugd/0a51c1_076df2dd9cf9442b87ddbdac02e0752b.pdf?index=trueIn PDF document text
    • https://627f215e-41ba-4aa4-9906-5f9f9d117739.filesusr.com/ugd/8ab72e_1890901453e64c11b83a5122acb009ff.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kelukakeb/que_es_el_sedentarismo_fisico.pdfIn PDF document text
    • https://b70645e9-42d7-44c6-80f2-f165c8819e8d.filesusr.com/ugd/3f1130_6826278d107f463a8bae43f2cae20990.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/42368201771.pdfIn PDF document text
    • https://da54c32a-99c7-4590-8520-800dd2d1cae3.filesusr.com/ugd/7973d2_ba3c1c56a2df4d6390f111598c99cfe9.pdf?index=trueIn PDF document text
    • https://5efcf519-4c71-4be9-a00f-e1d47ba804c5.filesusr.com/ugd/ebcc4b_30f5b2dae8244e69a60774dde0b8a9c9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/patotale/wazexakupewil.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000356b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x356B5 5940 bytes
SHA-256: 477f4938bcf92469dc78c06a138b72ea05b018d27bd985d404b3b991261332b6
font_01_sfnt_off00036ae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36AE9 17176 bytes
SHA-256: ede1010c4f6fd3786db9d0a777adae5175c458825c7c04fbb0c4e46e54edeaa7
font_02_sfnt_off00039fe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x39FE2 16376 bytes
SHA-256: 31e575375b91a06f477f049b548c5dbf019c5432a6231cedddb047ab5875cd9e

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