Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb0822d9813a87fb…

MALICIOUS

PDF

83.6 KB Created: 2021-09-13 17:06:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: bd55927ffd7fbbd8556e25afccbe762b SHA-1: ba312f7a0ff9cb862ffbb4ffbbcf3055b572f8cd SHA-256: fb0822d9813a87fbf65b53a86397d856e16ed372083b6e359d5ee5b4425fd9c8
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous links pointing to compromised websites and disposable hosting, suggesting a phishing or malware distribution campaign. The PDF structure and embedded links indicate it is likely intended to redirect users to malicious content, potentially leveraging exploits or social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://crewmak.ru/uplcv?utm_term=watch+the+good+fight+for+free PDF link annotation
    • https://www.dogandemir.av.tr/paketler/ckfinder/dosyalar/files/jilanulaxubaguvus.pdfIn PDF document text
    • http://pilanatofishing.com/home/sandbox/domains/shelter.sandbox.tritek.hk/public_html/ckfinder/userfiles/files/lajonuwejare.pdfIn PDF document text
    • https://rmp-traueranzeigen.de/cms/files/32707893867.pdfIn PDF document text
    • https://pomtco.com/technical/files/file/70481056544.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613764234c865---fuvaroxijux.pdfIn PDF document text
    • http://abcbyspu.net/ckfinder/images_store/files/xegudavolojiv.pdfIn PDF document text
    • http://avanti.pl/userfiles/file/88373273173.pdfIn PDF document text
    • http://otvorene-srdce.sk/userfiles/file/bibatazanugokinor.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/ee994643dd08dcb90b50068df9adf66c/zifevazut.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/f779a9607c8cb2213d199dc34d270ad9/tesanufup.pdfIn PDF document text
    • http://hsound.ro/images/custom/file/fodudisuvi.pdfIn PDF document text
    • https://metnar.pl/web/uploads/files/44695727449.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/38877288143.pdfIn PDF document text
    • https://suativisamsungtaihanoi.net/upload/files/47106461340.pdfIn PDF document text
    • https://renault-service.com/userfiles/6785748615.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/161316dca4b268---63697625984.pdfIn PDF document text
    • https://bwawarszawa.pl/upload/file/76588348858.pdfIn PDF document text
    • http://chinajessie.com/seadata/data/uploads/img/file/163084790719.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16131da206fe27---pinowe.pdfIn PDF document text
    • https://tskrea.com/userfiles/file/31977481956.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161312d81b4107---77606474520.pdfIn PDF document text
    • https://simpangkanan.com/contents/files/nudofewawagudatezolototog.pdfIn PDF document text
    • https://bestcaps99.com/ckfinder/userfiles/files/95828144507.pdfIn PDF document text
    • http://studiolauramoschini.it/userfiles/files/vefomopalim.pdfIn PDF document text
    • https://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/i3pj230o91s238d58rlievbn1p/zofogezud.pdfIn PDF document text
    • https://superchills.com/userfiles/file/3158419834.pdfIn PDF document text
    • 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_off0000e2bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAD2 10432 bytes
SHA-256: 0b0ad96c99c32d3f943301dbe19d592c726f2f9bff229211f34091fc5ddb6f04
font_02_sfnt_off00011273.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11273 17664 bytes
SHA-256: 3a9c73e022d4d29456adf2c59aae6ff4e6552d3e440c561b148fb81818357502

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