Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d77e6c9d738f35c…

MALICIOUS

PDF

85.4 KB Created: 2021-09-18 15:24:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e9eea8538fe73045adb5c329bc254dda SHA-1: b85e1a37c65b4f76ccf2cf2f014df6ce6ded50a2 SHA-256: 5d77e6c9d738f35cb03540dd8faec1a325dede8b7a1c6872d5c587972c410a85
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the 'SE_QR_LURE' heuristic indicate the document is designed to direct users to potentially harmful content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://infrive.ru/uplcv?utm_term=ip+webcam+viewer+online PDF link annotation
    • http://villa-carlshorst.de/sites/default/files/file/kinenunoferu.pdfIn PDF document text
    • http://radiopoint.cz/userfiles/file/11395111981.pdfIn PDF document text
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/377174bf5f7fa6ba427a16112666f3b4/93064558948.pdfIn PDF document text
    • https://gemwares.com/userfiles/file/10317016692.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/79543a0dfdbb61bd51cec370dbfc9539/funegezubipedunal.pdfIn PDF document text
    • https://fullmagicweekend.com/ckfinder/userfiles/files/91889406325.pdfIn PDF document text
    • https://soechi.net/userfiles/file/nawojuj.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613eecdf8b017---texidevexuvivejuvu.pdfIn PDF document text
    • http://chinajessie.com/seadata/data/uploads/img/file/163088600919.pdfIn PDF document text
    • https://pvesc.vn/uploaded/file/dedebexox.pdfIn PDF document text
    • https://korovin.org/site/img_ufiles/97317146169.pdfIn PDF document text
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/16135ca1c34d92---35971760388.pdfIn PDF document text
    • https://redac.ch/upload/37997882159.pdfIn PDF document text
    • http://xn--42-jlclgg6a3e.xn--p1ai/userfiles/file/29183960185.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/scjuuk1pdr8g5oilmjvsj28ga2/24447142878.pdfIn PDF document text
    • https://biogenetixpharma.com/ci/userfiles/files/sewatifafosupimifima.pdfIn PDF document text
    • http://vzwsportenmuziek.com/content_docs/gelix.pdfIn PDF document text
    • http://mosme.org/uploadfile/files/77901198437.pdfIn PDF document text
    • http://landpas.pl/upload/file/97685359446.pdfIn PDF document text
    • http://babywagen24.de/userfiles/file/pekasukixukikuxaxawesi.pdfIn PDF document text
    • http://braciszewska-klimek.pl/fck_files/file/1294654579.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614218c862650---davorudurogeveweka.pdfIn PDF document text
    • http://svazekobciorlice.cz/userfiles/file/11865374580.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021091102325673499.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_off0000e97a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE97A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010191.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10191 10512 bytes
SHA-256: 6584505a4ee088685dbec93ac6f6a5cafb302ee4d44d22f11b20dce5aea4c760
font_02_sfnt_off00011939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11939 17836 bytes
SHA-256: 5030170640395f760b191713ec32469e4fa830bef3f3aa02e06337f222178474

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