Malicious PDF — malware analysis report

Static analysis result for SHA-256 40c8d6f64be0aa26…

MALICIOUS

PDF

76.8 KB Created: 2021-02-26 18:18:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 3157ed71b60220478dd6fb63c4a0f3f6 SHA-1: cf62e3996d5df755d367f038a1a5c8eb0f440c86 SHA-256: 40c8d6f64be0aa266f49217639e39ae0c3b3ae820ac8b2f707c31847f0823a82
96 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating an external URI and is flagged by a machine learning classifier and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to connecting a TV remote, which is consistent with phishing tactics. The embedded URL likely leads to a malicious site designed to exploit the user.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://nipisod.ru/123?utm_term=how+to+connect+my+directv+remote+to+my+sony+tv PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4454420/normal_5fd2a45227742.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370076/normal_6030e7611ea5a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454668/normal_5fc62bede7253.pdfIn PDF document text
    • https://cdn.sqhk.co/kelifevaz/xhbMhcR/wish_merchant_faq.pdfIn PDF document text
    • http://manybigs.space/fundamentals_of_electric_circuits_fifth_edition_solutions_manualq4ygs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492546/normal_6023516cb3812.pdfIn PDF document text
    • http://air-calm2.club/android_9_pie_for_samsung_s7_edge504tz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457570/normal_5fcc560f98603.pdfIn PDF document text
    • https://cdn.sqhk.co/lojibuwe/LWijpge/hmrc_self_assessment_late_registration_penalty.pdfIn PDF document text
    • http://good-production16.site/are_anker_earphones_goodq9z3y.pdfIn PDF document text
    • https://cdn.sqhk.co/bexutavukaro/gf5hagj/ghost_rider_2_motorcycle_scene.pdfIn PDF document text
    • http://reduslimitaly.website/81723905650i39tb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455884/normal_5fe56f9c2679f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462708/normal_5fe10a1824e8c.pdfIn PDF document text
    • http://triple-doska6.club/consonant_blends_worksheetvux1v.pdfIn PDF document text
    • http://cenderaoriginator.com/how_to_use_oil_less_turkey_fryerwiu62.pdfIn PDF document text
    • http://ionatr.fun/altis_life_rpgk5fmj.pdfIn PDF document text
    • http://moresukko.ru/how_to_change_the_date_on_a_citizen_eco_drivepbrsd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486061/normal_5ff3ff385702a.pdfIn PDF document text
    • http://familyit.pro/the_aftermath_2019_movie_480pzollx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410965/normal_5ff1c90637211.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f10f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF10F 5060 bytes
SHA-256: 5ba8ca858777586831b3eb2ed8fb8c06a1a3a686867156bff445a80b18922c12
font_01_sfnt_off00010249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10249 10256 bytes
SHA-256: aace9832b5b6d57d002b7e2e7001da8803b0d3ee3f5d563b11fc755424c4d8db

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