Malicious PDF — malware analysis report

Static analysis result for SHA-256 14722e3d407a07d2…

MALICIOUS

PDF

74.4 KB Created: 2021-02-27 08:14:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: c9c6d13a992363b6fcf0870ee64e3178 SHA-1: ca01a08b1693c5e121249e15c27fcd42eb487143 SHA-256: 14722e3d407a07d277fec2552113ca6072061909ff4fab675122f5d3e410a791
184 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, many of which point to disposable hosting domains and redirector infrastructure, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lead users to further malicious content or phishing sites. No scripts were extracted, but the overall structure and URL analysis point to a link-farming and redirection attack pattern.

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
  • 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 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.
  • 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://crophysi.ru/aws?utm_term=macbeth+act+1+scene+2+modern+english+translation In PDF document text
    • https://zuvimetuna.weebly.com/uploads/1/3/5/3/135304981/fusamaloreri_naluzor_jejelaxuxozukaf.pdfIn PDF document text
    • https://gebifulud.weebly.com/uploads/1/3/0/7/130775692/wepopegetipeb_rifurokumokarir_mumaxoxib.pdfIn PDF document text
    • https://xagajopudulu.weebly.com/uploads/1/3/4/6/134697977/wowaxe_ripus_wiwegemol_bafeduk.pdfIn PDF document text
    • https://cdn.sqhk.co/tenokesime/2jXeijy/45748063161.pdfIn PDF document text
    • https://gawugabel.weebly.com/uploads/1/3/4/3/134361726/duzepijafokop.pdfIn PDF document text
    • https://voranafirodibug.weebly.com/uploads/1/3/2/6/132696030/5b6a101f2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450243/normal_5ffcc7ca8d8c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376374/normal_60127bd14c0a7.pdfIn PDF document text
    • https://fijogukovope.weebly.com/uploads/1/3/1/3/131379832/vuzap_zegawazufogorok_wanopa_winudu.pdfIn PDF document text
    • https://cdn.sqhk.co/tixukiko/ggSibIV/horizon_mobile_village_for_sale.pdfIn PDF document text
    • https://wozizagozesa.weebly.com/uploads/1/3/4/8/134848764/xisojikiwogamer-jibudenutawezaw-razifakekeb.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/94739148996.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462992/normal_5fed92c32c34c.pdfIn PDF document text
    • http://rowowesofazov.medianewsonline.com/pathfinder_character_sheet_fillable.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zubiluwetij.myartsonline.com/how_to_change_epson_8350_bulb.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_off0000e686.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE686 5684 bytes
SHA-256: 8f06389417e13aef787411c4676d97dab8e229f425e18baa519de5972c8a473d
font_01_sfnt_off0000f9b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B2 10264 bytes
SHA-256: 7a4b535c575e82562042f0c7c0c627f179ceee0a02835a661e7969f8238d5bb9

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