Malicious PDF — malware analysis report

Static analysis result for SHA-256 51a4ed43a997cf79…

MALICIOUS

PDF

79.2 KB Created: 2021-04-22 01:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5ed37aa45527456a31328c7390a8c978 SHA-1: c8b5e7f32c2a85d6721ccba90c826f7116a71f1f SHA-256: 51a4ed43a997cf791c68b0febbe03c924a9b472ae0188789a6b05b0f8a15d438
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a malicious site. The document body, though heavily obfuscated, appears to be a lure related to a search query, further supporting a phishing attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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=what+was+the+purpose+of+operation+iraqi+freedom
    • https://cdn-cms.f-static.net/uploads/4376625/normal_605ef79bdd20e.pdf
    • http://zuvels.xyz/define_apology_formaltf97i.pdf
    • https://cdn.sqhk.co/wugolekufo/hdiemsZ/77590816708.pdf
    • http://lumoxul.iblogger.org/ditel.pdf
    • http://skywonder.space/6262057271uq9e6.pdf
    • http://meetplafond.xyz/is_hem_ankle_rehab_legit95dwn.pdf
    • https://cdn-cms.f-static.net/uploads/4387819/normal_604564bca61ef.pdf
    • https://jeruxonoja.weebly.com/uploads/1/3/1/4/131407493/jalupedux_selog_jupemezinowu_bamune.pdf
    • https://bikigevoxepasi.weebly.com/uploads/1/3/4/7/134716722/tumeniris-sogibaporabazak-fupapamorates.pdf
    • https://takibuvekinapix.weebly.com/uploads/1/3/4/4/134456834/6473634.pdf
    • https://cdn.sqhk.co/pewesopefim/cheiihe/sad_anime_girl_images_download.pdf
    • https://nukubutanedun.weebly.com/uploads/1/3/5/3/135309192/latop_kesekirogob.pdf
    • https://kuginipa.weebly.com/uploads/1/3/4/8/134853520/mededibabavedozebavi.pdf
    • https://cdn.sqhk.co/pekobenew/ngh3Egh/gmail_inbox_app_themes.pdf
    • http://topcabinets.xyz/nixixedofezidizoxu3gg2v.pdf
    • https://vofitusu.weebly.com/uploads/1/3/5/3/135301199/1263600.pdf
    • http://vewazanujuwa.22web.org/73896511259.pdf
    • https://todijaxazifaro.weebly.com/uploads/1/3/4/3/134342800/pakam.pdf
    • https://palisuxil.weebly.com/uploads/1/3/1/0/131071308/4310700.pdf
    • http://deflecfcvy.best/casio_fx-115es_plus_manual24fnq.pdf
    • https://cdn-cms.f-static.net/uploads/4450040/normal_603c87df5cd12.pdf
    • http://kukikifo.iblogger.org/fexewifi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lobakixadob.epizy.com/dupilo.pdf
    • http://xixesasix.epizy.com/income_certificate_format_in_english.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_off0000f5bd.bin
59e0361e9e2c64e5b8d4ae464023dcfedb1db1c5030f5c1ab9ec9b47a098c678
pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BD 5480 bytes
font_01_sfnt_off0001084c.bin
0e166cb5fc2137e03078d8f4216ca33ce4d8b63238668568182375a6670efc35
pdf-font-stream PDF embedded font (sfnt) at offset 0x1084C 11560 bytes