Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5f0935f8bab5d97…

MALICIOUS

PDF

597.7 KB Created: 2021-01-18 19:07:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 222df46a12f6cc42f7a75d2201782d9c SHA-1: 9c6d9d2048c8ccd958b3e87de0b2e534bb509fe8 SHA-256: c5f0935f8bab5d976c42eecda3c1b5fb2909afbd6e6cb5baca234e800be0035d
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 high likelihood of malicious intent. It contains an embedded URL pointing to a suspicious domain, likely intended to deliver a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests a lure related to an Android update, aligning with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9689

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://traffine.ru/aws?utm_term=new+android+update+for+samsung+s8 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384464/normal_5fad5f198a903.pdfIn PDF document text
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/f9bdba75feb7db.pdfIn PDF document text
    • https://site-1166600.mozfiles.com/files/1166600/lds_sunday_school_manual_old_testament.pdfIn PDF document text
    • https://cdn.sqhk.co/xurazegoba/i8kgdgd/16116191405.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467571/normal_5ff9f606dfedf.pdfIn PDF document text
    • https://cdn.sqhk.co/zetanitanedo/BC1jijf/pazawuruvewaxu.pdfIn PDF document text
    • https://cdn.sqhk.co/reretukida/TOHY0kj/nofipevo.pdfIn PDF document text
    • http://bavedibigilomit.66ghz.com/aines_dosis.pdfIn PDF document text
    • https://jowodetuleguzu.weebly.com/uploads/1/3/1/8/131856173/12a5685dc.pdfIn PDF document text
    • https://cdn.sqhk.co/babakobesuxe/iaa8Hjc/85155279655.pdfIn PDF document text
    • https://site-1182802.mozfiles.com/files/1182802/microsoft_stream_download_video_with_captions.pdfIn PDF document text
    • https://mubuzetuwifo.weebly.com/uploads/1/3/4/7/134703000/gafapefanevokukara.pdfIn PDF document text
    • https://site-1178320.mozfiles.com/files/1178320/myrkur_ella_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/kovezozeseg/g1icOih/novoludubinogobawew.pdfIn PDF document text
    • https://sojugadetoju.weebly.com/uploads/1/3/4/6/134683069/3620710.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gebutetivifupa.epizy.com/49823972112.pdfIn PDF document text
    • http://zafurug.epizy.com/13489557579.pdfIn PDF document text
    • http://bidasumibave.epizy.com/14595888965.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_012_off00090935.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x90935 33140 bytes
SHA-256: ea15ac35704328ed9276bc5eb6a250289ed2ef0ffd7715cbe02ebd5ad0825eaa
font_00_sfnt_off0008ca90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CA90 5584 bytes
SHA-256: 92b820ac14537e70b5e3220baa72735ed482eeb8431413825cf101cea3b41c30
font_01_sfnt_off0008dd8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD8E 15032 bytes
SHA-256: 6e6ac43318ff9122924ebb62bd0a43da2631fba207c44b446a885f61206050af

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