Malicious PDF — malware analysis report

Static analysis result for SHA-256 e772a7733967dc98…

MALICIOUS

PDF

87.7 KB Created: 2021-06-30 18:56:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 88b8f908ac0fe0f1df7301bc18dce328 SHA-1: 2157cfc104126d9d30617746c57c6d012e6d14f6 SHA-256: e772a7733967dc98313fa7025852514bb230de41105666af677d3f86628e9c2e
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating it likely serves as a phishing or trojan delivery mechanism. The document functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised WordPress installations. The presence of these links suggests an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://101-games.ru/images/uploads/files/24870461189.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160cc7944cf585---wifemumadifimupujer.pdf
    • http://scantech3d.com/files/pukojikunito.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/81219afd1644c85dc2e283edd439e246/sojuko.pdf
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/2c6700472b46aa959847acd290c337d9/fowakebovetis.pdf
    • http://sendedianqi.com/upload_fck/file/2021-6-16/20210616155655933386.pdf
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607790e22e572---bekojifotanosok.pdf
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160789a846f810---36542519875.pdf
    • https://kidneystonetreatment.in/userfiles/files/zolinofuxejaxujoxaxaba.pdf
    • https://stopserv.ru/files/file/xowitugoxoliperaminulimu.pdf
    • http://arci-mp.fr/admin/File/67849530001.pdf
    • http://caffepontoni.com/uploads/file/fabifidavitug.pdf
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/e56ce63ed62a4aef7b8a04c2890ae4aa/ginokawoxumawobitivetaki.pdf
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/5965afff0aa57cc4c6e9622aea9f99cb/51390963665.pdf
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1609ab4e0225c5---5408318738.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/55789640345.pdf
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/a27bebcb5b04393278396c693678beaa/vesomolaveliz.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a70b94e1067---32274079478.pdf
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/d1krp8dm5o15ogh34n5l172cb7/mevixavidumilob.pdf
    • http://vivo-mebel.ru/upload/file/9333174638.pdf
    • http://bbfrontedelmare.com/userfiles/files/kisularaganenom.pdf
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607228d4c6ead---54209869153.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d98b3750f1---84075492476.pdf
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160907ce19e50f---4752322327.pdf
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/dfd3b9afcf226b25f962d5594cec5989/90394190325.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/61e3ab50955e6079ac0c7bba4ad91c08/dikaropasikumejogolav.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=welterweight+boxing+kg
    • 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_off0000f517.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF517 16792 bytes
font_01_sfnt_off00010d29.bin
c223ed8780b50e0bb3ed68098e26d3d0ba5d9bdac9d966d31d45bcfa4bef6443
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D29 17172 bytes
font_02_sfnt_off000139f3.bin
6ca9c447fd2b65e51f52fd35b9d69ebc94bab79b1828faf8660ef3f33dea7118
pdf-font-stream PDF embedded font (sfnt) at offset 0x139F3 10472 bytes