Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ea72b0f050a7200…

MALICIOUS

PDF

68.6 KB Created: 2021-03-31 06:57:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a7f55f261ceb6abfc04e88d816a2d282 SHA-1: 7b144a4dc2c04afef91893c796548a015533fccc SHA-256: 2ea72b0f050a720043f9551733eea0e3bd62bd48af7540307dfdfc70623a8004
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a phishing or link-farming attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with common phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://crophysi.ru/aws?utm_term=the+crucible+study+questions+act+2
    • https://cdn.sqhk.co/rewufarelaze/hthjidy/android_wifi_captive_portal_detection.pdf
    • https://cdn.sqhk.co/lamiwifa/hcKFSrC/2466050946.pdf
    • http://zonojebiridizo.mywebcommunity.org/92606394512.pdf
    • https://cdn.sqhk.co/kimazibo/xifjiia/3684988759.pdf
    • http://jabofedu.sportsontheweb.net/enterprise_risk_management_book.pdf
    • https://wozogerodinanu.weebly.com/uploads/1/3/4/4/134498855/wiririjilube.pdf
    • https://veropomoveda.weebly.com/uploads/1/3/1/4/131453256/02a071a12047de.pdf
    • https://cdn.sqhk.co/parepejapoki/ilijpie/jefonujonifak.pdf
    • http://gidujoluj.mypressonline.com/birewe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://61df3396-90b5-4b69-a3ae-475c9da6ebc5.filesusr.com/ugd/516574_24b2d6daa7af488e8822d868b552e450.pdf?index=true
    • http://vejegaba.atwebpages.com/tagumonibos.pdf
    • http://mudalulox.epizy.com/67251395186.pdf
    • https://s3.amazonaws.com/ginutu/25076961521.pdf
    • http://xojukoliw.epizy.com/abc_store_prices.pdf
    • http://xuvekixofeku.onlinewebshop.net/excel_financial_functions_list.pdf
    • http://vidabovon.epizy.com/81702390290.pdf
    • https://s3.amazonaws.com/vobuturinivi/48148556408.pdf
    • https://30dce114-5b7d-4ba4-aa44-e083516804ec.filesusr.com/ugd/7de0fd_05a32877f3314bfb8564afdeeca1241e.pdf?index=true
    • https://s3.amazonaws.com/xasovewipeje/font_color_in_css_stylesheet.pdf
    • http://jovebagubalolif.epizy.com/vitilaravatozekeri.pdf
    • https://457cefd1-268f-49c0-9ca4-ced5ac281e6b.filesusr.com/ugd/983758_a38406f2a6bb464bb3797d94bda1673e.pdf?index=true
    • https://0778d94d-b67d-49c3-8f6f-43f52d6edec9.filesusr.com/ugd/b85eb0_fb454cfe09c849b094b8898b55ba534f.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0ae.bin
f3bdbf04d19a10a52ed0c5ceb8afaf470a502e220960a801fc99f33e54d1160a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD0AE 5476 bytes
font_01_sfnt_off0000e344.bin
9b0b30b51a070ae99284e4cb747aee5a186ec7eeaa5844c3009ab5000cdba1fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE344 9964 bytes

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