Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6a215b1ad0fa167…

MALICIOUS

PDF

83.4 KB Created: 2021-07-03 18:12:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: c19a04680fda422bd0cf7bc0f065ae91 SHA-1: 5020b912524216ba495925b2e6074810a446f2d7 SHA-256: e6a215b1ad0fa1679c869502e0a5f38bc7d0b6595e31885a32600359b62a2538
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting. The presence of multiple distinct hosts and the use of UTM parameters suggest an attempt to distribute malicious content or phish users. No scripts were extracted, and the document body was unreadable, but the heuristic findings strongly indicate a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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://alliance-vietnam.com/upload/files/koxebetumew.pdf In PDF document text
    • https://universal4shipping.net/userfiles/file/66165792958.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb126755e1---28077851199.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/828fac8e4b54defe3fdcc5be29d7745e/bawukukowipawekuzi.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/64b5ae92c089f6c47ec946acf94cec72/9456172831.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/uklq8clikto14s0u3ensn7m9p2/jifidadimixebana.pdfIn PDF document text
    • https://www.scilights.com/wp-content/plugins/super-forms/uploads/php/files/2bdb6e2237b7efcdca8e7c91218cedf5/fukogifabevogibakimusenel.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1c6c37eb1---bifetunobefedo.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607baed15a10b---99293920607.pdfIn PDF document text
    • http://blissrenewbeauty.com/newerac2c/userfiles/file/77454942283.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1609404c501510---xiwibalidabidabegabadixum.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/nowalogumupabudulale.pdfIn PDF document text
    • https://eminesenlikoglu.org/resimler/files/90973575758.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/rck56lj70ofad19kukhjv6s6p3/42098851044.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/140d9eb663814e1308886799872d2254/36467761441.pdfIn PDF document text
    • http://kalikraft.com/images/file/33199659830.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/f151b770d2d10fa3b594725e954400e0/13705120717.pdfIn PDF document text
    • http://eortak.com/img/fck_temp/file/80359020199.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/talimetosulixivazel.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9ca2dfb5a---78021207302.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160738da718d36---diwolokidikesewaje.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b04c702149d---tukegodob.pdfIn PDF document text
    • http://mpti.ru/userfiles/file/wapevukotalenolik.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/f85eccd638ae567990d303f3cf15eb35/96114747073.pdfIn PDF document text
    • http://granite1962.com/clients/869125/File/81477874967.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=clans+of+clans+hilePDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE126 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF938 19024 bytes
SHA-256: 83af966f80204f2762b51f0941360ed3729b70fcc12fa497f1ec22216962f0bd
font_02_sfnt_off000127dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127DD 10264 bytes
SHA-256: 34cdf6b63d44effe3c1dd595c3e60ff63737684582ff64dfca1eefd01c4d3b7a