Malicious PDF — malware analysis report

Static analysis result for SHA-256 a49ac99d5028dfb4…

MALICIOUS

PDF

171.3 KB Created: 2021-03-15 07:19:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 361efbcd02c70039c2f4e606a25cce4e SHA-1: d3f9c1daff8bc898b1ff18a7bca1613b9852915d SHA-256: a49ac99d5028dfb4ccd873a6a10ea0c7f17a05d3e6d75d6b78eae01e61e993c3
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search result, likely intended to trick the user into visiting a malicious site for phishing or malware delivery. ClamAV and ML classifiers strongly indicate malicious intent, classifying it as a phishing trojan. No scripts were extracted, but the PDF structure itself facilitated the malicious URL embedding.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://dugedepap.ru/award?keyword=antony+and+cleopatra+shakespeare+pdf PDF link annotation
    • https://cdn.sqhk.co/fawabanof/Q1WJuia/65858913843.pdfIn PDF document text
    • https://cdn.sqhk.co/xesozugis/Jif0jji/fududelimazukuxuvobidez.pdfIn PDF document text
    • https://cdn.sqhk.co/gapobuzijiru/gdjBwid/23693150419.pdfIn PDF document text
    • https://cdn.sqhk.co/bilanogakiw/hinfchd/mexexafebefazavazolej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382778/normal_604868460771b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369645/normal_5fc869813e96c.pdfIn PDF document text
    • https://cdn.sqhk.co/xeposetuge/hbdCcjc/28882355720.pdfIn PDF document text
    • https://cdn.sqhk.co/vefusujix/LgjivpM/zoromalatukadajagewovape.pdfIn PDF document text
    • https://cdn.sqhk.co/tajugajobib/EIlb1ji/studio._code._org_course_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/xogixute/hcYjhhe/boat_wallpapers_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/zanotunuzi/chbbjh6/71661700547.pdfIn PDF document text
    • https://cdn.sqhk.co/wareberefiz/Mjj2ric/bus_driving_simulator_for_pc_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/mepapogivoma/YsBiihi/hashtags_to_use_on_instagram_for_likes.pdfIn PDF document text
    • https://cdn.sqhk.co/buvaboda/kUaiiHs/mukufivodu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/liwafo/gentamicin_iv_administration_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/bogof.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/report_lost_or_stolen_drivers_license_texas.pdfIn PDF document text
    • https://28932ed2-21d9-4123-99cb-fcff0aac4472.filesusr.com/ugd/cc089a_366725a1f98342b090ab6a69719ec81b.pdf?index=trueIn PDF document text
    • https://2e6726a7-2e78-456a-9fa1-8bc85c3b20a6.filesusr.com/ugd/76e31d_b38285018c06445f8c944af08edbd762.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazemi/zejeruvusavagubad.pdfIn PDF document text
    • https://s3.amazonaws.com/dinisemowoge/bilukomuseve.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_off000268c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x268C8 5396 bytes
SHA-256: f5ed5bce4b84efacef9b9ed3d96491e42747e41431dbc3af25da6ea51a660bd3
font_01_sfnt_off00027b28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27B28 10528 bytes
SHA-256: 50d492f5f7ef91f32e424c3e4ec4be38e6e8453ffa5aa08488e00ca355c3b260

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