Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aab7bb579cd3985…

MALICIOUS

PDF

83.3 KB Created: 2021-06-29 05:04:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ec9e5bcef739a6eeebdc2d14e935c828 SHA-1: 9ef702d96ea964c601dbfdcc1be40f4908d8d522 SHA-256: 1aab7bb579cd398563229b42039b8e304dee7b88c5a20e8e445a97315fd411d7
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The 'SE_BROWSER_INSTALL_LURE' heuristic suggests the document attempts to trick the user into installing a browser extension or update. While no scripts were explicitly extracted, the presence of numerous links to compromised CMS upload directories and disposable hosting points to a phishing or malware distribution scheme. The embedded URLs, particularly those hosted on compromised WordPress sites, are suspicious and likely serve as part of the lure or payload delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/97f46efb372ebeeb0a63f8f914cf9de7/gawelozaranitojo.pdf
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/c13c4bc11a366f857da05df1045ac79e/pofavarezejuzufav.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3aed4feb3---13517335872.pdf
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/94a48b0c947f4ea997b13d5049784e0a/71848727362.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/6c8329bcm8i07rc8g50jdaii2t/2829257305.pdf
    • http://ncabhsa.com/clients/875427/File/33940732161.pdf
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/2uquebshmce0gkrjudlu5uvs8s/43296847364.pdf
    • https://burstallconrad.com/editor_files/file/29087625009.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/50688163993.pdf
    • http://raiders71.com/clients/4/41/4134020f2f298c111575624a380fabfc/File/tuwugukinijozagijimukik.pdf
    • http://olversonfamilyreunion.org/clients/5/51/51a48c89da211807e19ed56f8a1a1822/File/basivubepinaxokitekomev.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c479a1982c0---84858470269.pdf
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/bjs20d8n3hfnnahnpl3gue65s6/32808728255.pdf
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085bc783d26e---parivatirezidewusew.pdf
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/lukemuvezidifokenepijaka.pdf
    • https://ph2020.org/FCKeditor/file/7372973584.pdf
    • http://rbtyutj01.com/userfiles/files/21821300820.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c2gk25nqpod27l6lns7ktgf2u7/2820498003.pdf
    • https://aadhaarretail.com/administrator/imagetemp/file/65393548540.pdf
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/tedv1pcbvsmuat26jv2btqmm4c/97300088295.pdf
    • https://szabobuszrendeles.hu/files/files/nalujuxemosawovekakurali.pdf
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b33bfc7ede3---88997197404.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+get+robot+goat+in+goat+simulator+mobile
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e10f.bin
41284cd274e529e2db7d15c3ae518a0621d4867f37a7fa691964fc33da2ffec5
pdf-font-stream PDF embedded font (sfnt) at offset 0xE10F 17624 bytes
font_01_sfnt_off00010ee5.bin
e0411d5a7e3c5254df5009bd36afda9cf59e4510a29c75a80b7024556776b63b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10EE5 10768 bytes
font_02_sfnt_off000127b0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x127B0 16792 bytes