Malicious PDF — malware analysis report

Static analysis result for SHA-256 88563df1d4192a2f…

MALICIOUS

PDF

73.8 KB Created: 2021-04-25 02:10:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3939f5ccb2409ab9be7c65c6a7569391 SHA-1: 332b309115b125025835edf46a5d02d02a610541 SHA-256: 88563df1d4192a2fd3a3d58aa8961e357dfc81dc1dc0a61f420803456c0488fb
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to a suspicious domain, which is a common tactic for phishing or malware distribution. The document body, though heavily obfuscated, contains text that appears to be a lure related to musical chords, suggesting a social engineering pretext.

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://dafemum.ru/strik?utm_term=jesus+mi+fiel+amigo+acordes+para+piano
    • http://trells.space/638844859620hd5s.pdf
    • http://jabilevij.mypressonline.com/gazutowunonoba.pdf
    • http://servisvds.ru/jopuwijegajofeucyg.pdf
    • https://cdn.sqhk.co/zativojor/idsjWix/fm_2018_wonderkids_shortlist_download.pdf
    • https://cdn-cms.f-static.net/uploads/4426409/normal_5fd0a6768642f.pdf
    • https://cdn.sqhk.co/koroxofusino/dZWjgmn/time_traveler_from_2030_note.pdf
    • https://static.s123-cdn-static.com/uploads/4501356/normal_5ff427377a921.pdf
    • https://cdn-cms.f-static.net/uploads/4409827/normal_6041ade497521.pdf
    • http://nawitebexu.medianewsonline.com/causes_of_diabetic_ketoacidosis.pdf
    • http://prosale.company/lameweruxexabcmg4.pdf
    • http://lejifip.sportsontheweb.net/nutricion_enteral_y_parenteral_en_neonatos.pdf
    • https://cdn.sqhk.co/mivuxakadu/giQqYgN/vazuxodipilujedat.pdf
    • http://arm-watch3.club/30592832002teo17.pdf
    • http://lewuvumo.sportsontheweb.net/anabolic_and_catabolic_reactions.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://6bb2b61b-82bf-473b-8365-63ddb02ddbdd.filesusr.com/ugd/d55797_fbed8c734809466fa5e58e177561bbd3.pdf?index=true
    • https://e61e9f85-32c5-4861-9fd4-b89109084c35.filesusr.com/ugd/2e4eb4_9e2bb46b9bb84a67be7817b88ad065e1.pdf?index=true
    • https://b19b3b79-9ae2-4e99-9b16-ef32671d60f4.filesusr.com/ugd/0bc867_33676510d27d4f98b52a846480e7cd27.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2ef.bin
44ca86bfbc62f218849e07bd0c2d648b7c698fead36ae0ed47293e7bb77aed7a
pdf-font-stream PDF embedded font (sfnt) at offset 0xD2EF 5268 bytes
font_01_sfnt_off0000e4b3.bin
990fcdc5cca21d09a85b52837c9fc9bb16e65ec587e4f45e06baf9443c26f4bb
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B3 12040 bytes
font_02_sfnt_off00010c1c.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1C 4324 bytes