Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8f8d7f333549730…

MALICIOUS

PDF

70.3 KB Created: 2021-02-22 16:13:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 0f1c634e0a0ae78fb81601c302712cf6 SHA-1: 8275e2a62012bc898c745992b142e5da77ff24cc SHA-256: a8f8d7f3335497301ba2dec6eaf244a510c2316eb8f87145e7911e9a817e0f58
96 Risk Score

Malware Insights

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

The file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. The presence of external URIs, specifically 'https://druttle.ru/123?utm_term=computer+science+illuminated+7th+pdf', suggests the document is designed to redirect users to potentially malicious content or download further payloads. The document body, though heavily obfuscated, contains metadata related to PDF creation, reinforcing the document's nature as a potential lure.

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://druttle.ru/123?utm_term=computer+science+illuminated+7th+pdf PDF link annotation
    • http://presentinsta.site/96312537675j92yd.pdfIn PDF document text
    • https://cdn.sqhk.co/ziriziwebu/rggiiMZ/48033792203.pdfIn PDF document text
    • http://igclienteam.com/carry_on_luggage_weight_jetbluewp7jz.pdfIn PDF document text
    • http://verification-help.com/network_security_baselinecle55.pdfIn PDF document text
    • https://tawozajoruje.weebly.com/uploads/1/3/4/3/134314125/xuveki.pdfIn PDF document text
    • https://cdn.sqhk.co/ramidazumiko/aGTNhdT/bible_word_search_puzzle_game.pdfIn PDF document text
    • https://fuvobavan.weebly.com/uploads/1/3/1/6/131637325/fosorixomipevof-gavanajeg-kemefonejuf-xukupuvoruje.pdfIn PDF document text
    • http://dhl-order.info/warriors_of_the_universe_online_guidenyunb.pdfIn PDF document text
    • http://getyourscore.info/vodepumai658.pdfIn PDF document text
    • http://nakrutkavk.site/instagram_dark_mode_androidd11a3.pdfIn PDF document text
    • http://nickned.me/abbyy_transformer_plus_fullrb7ly.pdfIn PDF document text
    • http://biomaniix.website/2173248566b2x4n.pdfIn PDF document text
    • http://baugroup.info/lamozuwawowotukuok8b4.pdfIn PDF document text
    • https://bedaruwi.weebly.com/uploads/1/3/5/3/135326402/933329.pdfIn PDF document text
    • https://cdn.sqhk.co/wamiratena/Fgh6gg1/video_calling_website_free.pdfIn PDF document text
    • https://cdn.sqhk.co/nisonodoweb/9ngghfX/85986490365.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/free_embroidery_software_pes_format.pdfIn PDF document text
    • https://s3.amazonaws.com/loranoduzuja/jubukodaputawuzisami.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/bitcoin_gratis_android.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/windows_bitmap_font_format.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/lalulakasaxilofi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD586 5380 bytes
SHA-256: 10439904abd2804b69f29b2a024d04507164ae17ade2fae7ee5f44320b4cd4af
font_01_sfnt_off0000e7a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A7 10692 bytes
SHA-256: 9e160ec28010a8a6a51886f0445f630d431fc3fe1a0daa1d66fe63cdd7c65acb

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