Malicious PDF — malware analysis report

Static analysis result for SHA-256 05deda5848d7f4a8…

MALICIOUS

PDF

87.7 KB Created: 2021-06-26 00:05:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b2502b1ef8924fec72d8692781d515f6 SHA-1: 003a76e10aa4294c21603e19c12c37837ec78b14 SHA-256: 05deda5848d7f4a80e11fd06faa349b5d84b5d4a38156db4d764324aadcb8170
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous links pointing to compromised CMS upload directories and disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a common PDF-based lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • 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 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 http://accronline.com/userfiles/file/taravobudogob.pdf
    • https://howardsteeves.com/wp-content/plugins/super-forms/uploads/php/files/f013f274971d16669569e568d4e1a8d0/77694861246.pdf
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609ded7375587---44995798065.pdf
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/f7590d816ec4fa85e40ecb60be482a16/wodufor.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609d324209458---4387400998.pdf
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bad13f94c9b---63434635799.pdf
    • http://www.predia.cz/userfiles/file/manoz.pdf
    • https://www.ideaklinikankara.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d90f67e505---56910072363.pdf
    • https://vegas-shop.net/uploads/files/42140790123.pdf
    • http://aggengr.com/uploads/CMS/file/81747562301.pdf
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/55gl7vu31pngvte0ubkn6qqtvo/minizisupa.pdf
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c8909af46---25029052905.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16080ea905c7e0---wabosog.pdf
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/fe4e3bab612eb397a2150355f08b429b/jidumawu.pdf
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/3a25a4aa92e93fad65f0971435d2e7ef/velabojugesobivudajodosa.pdf
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160805d9375d95---34972890476.pdf
    • http://bajajsports.com/userfiles/file/68212524054.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609c4e39251f3---visogurikez.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b850a02d4c7---46862773252.pdf
    • http://abogarestudio.com/userfiles/file/51591761160.pdf
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160be447937436---78408347452.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/c12c89d13b1177f10bd5f2f74f231791/lolurexijuridid.pdf
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/c2a408f71541a89f2a65c5039a40b7da/13736841550.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=what+was+developed+by+tim+berners+lee
    • 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_off0000f119.bin
63dd760c7b6a0fb39dd2b365f699a42de23bd1c443172dffd558c032c96f5d3a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF119 11056 bytes
font_01_sfnt_off00010a7c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A7C 16792 bytes
font_02_sfnt_off0001228e.bin
7662ae4913cc6ad58e52e5729017b4c5caa6af991fd2fffbcd1d5009a27bee1c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1228E 17868 bytes