Malicious PDF — malware analysis report

Static analysis result for SHA-256 25281129cfb76525…

MALICIOUS

PDF

75.3 KB Created: 2021-02-24 05:26:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 9ebc2544e13a2739abe215a89f535a58 SHA-1: 9a732b6ac98f1b219fca376c38dcf09a6c10bab9 SHA-256: 25281129cfb7652558d7a4593e41835d2a6a3247a5fc3031fa3497be24afbf25
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a URL that mimics a search result for a PDF document. This is a common lure for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a malicious payload via the embedded link. No scripts were extracted, but the presence of external URIs suggests an attempt to download further malicious content.

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://jacksth.ru/wix?keyword=the+origins+of+the+modern+world+pdf PDF link annotation
    • https://cdn.sqhk.co/nozelenid/hsljeDe/world_war_1.pdfIn PDF document text
    • https://cdn.sqhk.co/duxadikoti/bifjcl7/59062818495.pdfIn PDF document text
    • https://cdn.sqhk.co/wolanojijen/94KgdYq/flip_out_rushden_lakes_cost.pdfIn PDF document text
    • https://cdn.sqhk.co/sifajoxojif/duiiULJ/wijawuxagobewalodafos.pdfIn PDF document text
    • https://cdn.sqhk.co/fefowofuk/YignMha/11953388747.pdfIn PDF document text
    • http://cyberghost.store/whatsapp_auto_reply_iphone_without_jailbreakaf2s8.pdfIn PDF document text
    • https://cdn.sqhk.co/zobelekivix/aHjaXjd/art_wallpaper_for_iphone_xr.pdfIn PDF document text
    • https://cdn.sqhk.co/javomekoru/jvhfPNA/my_story_malayalam_movie_song_lyrics.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/lofese/59570447852.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/veganiburavaluvazibujuna.pdfIn PDF document text
    • https://s3.amazonaws.com/lejivugeleguwod/sowezoxepokijojebeba.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/answers_in_genesis_atheist_conference.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/94915338366.pdfIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/kawefimopodevamulorub.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/rewavagewebakowazukax.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_off0000eae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE9 5288 bytes
SHA-256: cb141b71f7b811797fc35ea9f8da7024bc05d92bea7f80dae00a6fb3b14f99cd
font_01_sfnt_off0000fcd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCD3 10412 bytes
SHA-256: f439e6471e54dc072d213f33fa6cdddf5c4854df947f3bbc9c0ecc0c21bd5f21

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