Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6ae14567e0f9789…

MALICIOUS

PDF

78.4 KB Created: 2021-01-11 22:55:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 1e73a99cc5edb1beb5821ef1d027660c SHA-1: 5cf8f1d5cca1abfdef8cf7de35fc3c6ae3fddf45 SHA-256: e6ae14567e0f9789b5edcad5e557cd72586c5452b095fc8de2ae0391db8ecaa3
262 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF contains a malicious redirector link and a link farm, indicating an attempt to direct users to malicious content. The presence of a 'download button' lure and the ML classifier's high confidence score further support a malicious intent. The document body, though heavily obfuscated, contains references to 'Gta sa cleo cheats apk', suggesting a lure for game-related cheats or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffmen.ru/aws?utm_term=gta+sa+cleo+cheats+apk In PDF document text
    • https://site-1171417.mozfiles.com/files/1171417/crossword_solver_dictionary_creation.pdfIn PDF document text
    • https://kodiridit.weebly.com/uploads/1/3/5/3/135342100/nalopejomuxani_towadeg.pdfIn PDF document text
    • https://site-1176360.mozfiles.com/files/1176360/24297861630.pdfIn PDF document text
    • https://site-1167986.mozfiles.com/files/1167986/blockchain_technology_companies_australia.pdfIn PDF document text
    • https://site-1168299.mozfiles.com/files/1168299/5422079741.pdfIn PDF document text
    • https://site-1195605.mozfiles.com/files/1195605/65955632047.pdfIn PDF document text
    • https://farufawajil.weebly.com/uploads/1/3/4/7/134726947/fifemedukagamaralu.pdfIn PDF document text
    • https://samibogamo.weebly.com/uploads/1/3/4/8/134883552/9565d04c7.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/mubefula/descargar_assoluto_racing_hack_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/voxazedisula/koliximunuvidebiriligusi.pdfIn PDF document text
    • https://s3.amazonaws.com/tadevewuju/51631717348.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/larixelakudowek.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4CC 4652 bytes
SHA-256: dda40e66cf6f9f1fe7bb505317dda9903ed697440578f65835df5d5a342d3cdd
font_01_sfnt_off0000e4b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B0 10620 bytes
SHA-256: b31f8fd9602bc68257e0261d3980d41191bf1e27ba7be85066ed8612207ae940
font_02_sfnt_off0001096e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1096E 16144 bytes
SHA-256: 72280254791087598a4baa5b23d626e9212d95aabee90359a51da2db42d8402b
font_03_sfnt_off00011e7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E7D 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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