Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bd588621334db98…

MALICIOUS

PDF

78.9 KB Created: 2021-02-16 13:01:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b1a71f4947517b3e4c6e4c692691e807 SHA-1: e798e81ed10115756c311b1d4ca56f0d1d0cc1c8 SHA-256: 7bd588621334db989958a14033148c3d7c09907327b67f77d40b1ff3996de75d
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to disposable hosting and link farms, a common tactic for phishing or distributing malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'theories of punishment', likely to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jottigo.ru/strik?utm_term=what+are+the+common+theories+of+punishment PDF link annotation
    • https://zubikazosiz.weebly.com/uploads/1/3/4/7/134761183/jemudepadap_kukawetoroza_feruwokuvar.pdfIn PDF document text
    • https://zuwukozoxuwiged.weebly.com/uploads/1/3/4/7/134713444/vuxututibanemazojab.pdfIn PDF document text
    • https://kanapefa.weebly.com/uploads/1/3/2/7/132740413/dukopogovipizug.pdfIn PDF document text
    • http://terem.space/roms_para_citra_3ds_emulador_androidtb84o.pdfIn PDF document text
    • http://gokuluzed.iblogger.org/hotpoint_ariston_aqualtis_aqm8d_49_u_manuale.pdfIn PDF document text
    • https://gareketekefebon.weebly.com/uploads/1/3/4/6/134695024/e994e8cded69.pdfIn PDF document text
    • http://siankaanmexico.com/gejasitbhi.pdfIn PDF document text
    • https://maxawoxemun.weebly.com/uploads/1/3/4/6/134615094/wevutu.pdfIn PDF document text
    • https://juzubuju.weebly.com/uploads/1/3/4/7/134703155/77923afea8.pdfIn PDF document text
    • http://idealica-italiaufficiale.site/52185366215opfl5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/sitok/taekwondo_black_belt_forms_itf.pdfIn PDF document text
    • http://pizubape.rf.gd/brandon_grotesque_font_zip.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/avatharam_video_songs_hq.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/armed_heist_apk_offline.pdfIn PDF document text
    • https://s3.amazonaws.com/wemofodi/google_play_store_apk_free.pdfIn PDF document text
    • http://zazisuj.epizy.com/polixojelepobozugimeg.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/97788230415.pdfIn PDF document text
    • http://tasaronusofake.rf.gd/81275666040.pdfIn PDF document text
    • http://weguxoxuwaxa.epizy.com/afro_blue_erykah_badu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD8 5116 bytes
SHA-256: 12636392f8bd7dbc282e534ebc2be5824899b904c38fdcd869d0098a5c9d0f83
font_01_sfnt_off0000fd25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD25 10132 bytes
SHA-256: 7c5328e8f4441e2a939d27bd19e5a7fc7d4ea774587654606e1c074dd9baec01
font_02_sfnt_off00011fc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC2 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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