Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d74da9be3d1d6be…

MALICIOUS

PDF

74.8 KB Created: 2021-04-01 02:43:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b3de78876bb94fca7a41b57244c2e79 SHA-1: 2a45e09af10a30e155d1ba25c0ca4570974bb1cc SHA-256: 5d74da9be3d1d6bee5b74cdcfa49c3cd2edfc071d006b0fb07d95c31db90e262
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI that redirects to a suspicious domain, likely as part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of an external URI and the overall detection suggest the document is designed to exploit users by directing them to a malicious resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/strik?utm_term=how+to+shut+off+elkay+water+fountain
    • http://vobafoselalulor.mypressonline.com/tevukobapexetabevu.pdf
    • https://cdn.sqhk.co/dodirijobadi/pitSjhg/toddler_girl_princess_dress_up_costumes.pdf
    • http://creditscorerepair.info/most_common_gre_words_2020dkrh8.pdf
    • http://jiwapadenejeza.getenjoyment.net/sewekixekesudu.pdf
    • https://cdn.sqhk.co/ripalufix/gecQxjh/origami_animals_easy_but_cool_3d.pdf
    • http://ig-soft-team.com/dr_seuss_books_read_aloud_with_wordsvpe9u.pdf
    • https://cdn.sqhk.co/netesatova/jbTiaPe/jadaloteb.pdf
    • https://cdn.sqhk.co/molewekane/chjk5Y8/zokiwewi.pdf
    • http://winoorama.site/c2988_unrecognizable_template_declaration_definitionzxd56.pdf
    • http://lessonsonline.site/how_long_to_learn_tableaudy5h1.pdf
    • https://cdn.sqhk.co/daxerarugak/eiiLqhg/vawaruxevetujunudawov.pdf
    • http://rufejupewanun.iblogger.org/tus_zonas_erroneas_dr_wayne_w_dyer.pdf
    • https://cdn.sqhk.co/kefiruge/c3idPlJ/wibawigi.pdf
    • http://mercelus.xyz/siwufejirapuginedefa19nns.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://98cdd5c5-c43e-49eb-9373-39517e896cbb.filesusr.com/ugd/90661f_817e5aa76a9a4c20a55b5e9d04f29345.pdf?index=true
    • http://mewabetowa.myartsonline.com/boiled_egg_diet_plan.pdf
    • http://pugetuwozijeso.rf.gd/72702701707.pdf
    • https://d2d87fd5-5f4d-49aa-ab3c-2263ce4b5d22.filesusr.com/ugd/9169d2_78c6b7ba70344083b7e2d01f9060b46d.pdf?index=true
    • https://8650d040-a33d-467d-a608-6706f181f11b.filesusr.com/ugd/61b8bf_040ad61cf4954e19a66723f9be2fbf11.pdf?index=true
    • http://rubujizuz.epizy.com/kopexele.pdf
    • https://df256b98-640c-444d-885a-8195c7360722.filesusr.com/ugd/40b9e6_d376d1f605df46139784a48cbdbcc956.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e666.bin
259984132345150f2569782bd380a51112614a5caf5f57ad36e2d85dc558fb0b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE666 5072 bytes
font_01_sfnt_off0000f7b7.bin
f577e5e3add05d307bff1fa6f5d5b06047c2211bc51f1b1dd11f23318854d44e
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7B7 11108 bytes