Malicious PDF — malware analysis report

Static analysis result for SHA-256 8511ea8ba94c0613…

MALICIOUS

PDF

73.3 KB Created: 2021-03-25 18:32:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 60dd2ec76c05f2bcb29fe62f7c5974d8 SHA-1: 5580e35c92bb62d16eeaf154bfa262a508a890e3 SHA-256: 8511ea8ba94c061307c7e350a95ad3767140dc5feb24612c3ddf2644c816f6f7
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified as malicious by ClamAV and an ML classifier. The document body, though heavily obfuscated, suggests a lure related to educational content. The presence of multiple embedded URLs, including one that is directly linked to the document's apparent topic, indicates an attempt to redirect the user to a malicious site for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://pelibifir.ru/wix?keyword=heating+curve+of+water+lab+worksheet+answers
    • https://cdn.sqhk.co/kapopuvida/hgfhajf/35015618331.pdf
    • http://ipai.online/284155643114gzem.pdf
    • http://siondez.ru/resea_de_la_fenomenologia_del_espirituje4ud.pdf
    • https://cdn.sqhk.co/bebumula/RjigcdT/service_box_peugeot_free.pdf
    • http://avto-document.site/suvevugadxlxx.pdf
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5fd7da641af3a.pdf
    • https://cdn-cms.f-static.net/uploads/4420588/normal_601fb70d4cb58.pdf
    • https://static.s123-cdn-static.com/uploads/4370737/normal_5ffa50a568bfd.pdf
    • https://cdn-cms.f-static.net/uploads/4477409/normal_604ad2e60017c.pdf
    • http://zavarivaemvmeste.ru/who_dies_at_the_end_of_godfather_19z6hi.pdf
    • http://hookup153.site/sivinedalinufobz5ks.pdf
    • https://static.s123-cdn-static.com/uploads/4446646/normal_5fe151848a5c3.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://taruligewonuna.rf.gd/mawomiragekabofolosodere.pdf
    • https://s3.amazonaws.com/musoxifuvitalo/fivepanun.pdf
    • http://nivewuwasidurus.epizy.com/arcos_de_movilidad_de_las_articulaciones.pdf
    • http://wuxekijonudi.epizy.com/98712096168.pdf
    • https://s3.amazonaws.com/vibuvomomuv/sazikutuzidadufodes.pdf
    • http://vikuwopijoxu.rf.gd/what_is_a_street_cat_named_bob_doing_now.pdf
    • http://sasomibaben.rf.gd/2020_ap_human_geography_exam_questions.pdf
    • 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_off0000e043.bin
9fe912b16a027a24872fd7ba212bb1974301b60ccc9b7a0614864bf70585b111
pdf-font-stream PDF embedded font (sfnt) at offset 0xE043 5460 bytes
font_01_sfnt_off0000f2eb.bin
0e04d6a708ac96ca34c8866ac57e570f8697c6c275cbe3cf18c8fbb5b0ebb4dc
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2EB 10844 bytes