Malicious PDF — malware analysis report

Static analysis result for SHA-256 c08a7d2cf1d96f90…

MALICIOUS

PDF

84.5 KB Created: 2021-09-20 06:53:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 2a2152264c34a706e094e814eb68afa1 SHA-1: 553b58d7f2577ca02c986d59a3503ff89b785b33 SHA-256: c08a7d2cf1d96f906d7eafa00f3f9592335211d0ebfa3d9148d731bf0c6e8772
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, potentially leveraging JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://philabc.ru/uplcv?utm_term=how+to+use+my+phone+as+a+router PDF link annotation
    • http://lex.tj/img/file/bumofudam.pdfIn PDF document text
    • http://stelmart.ru/userfiles/file/35267317374.pdfIn PDF document text
    • https://atasuorganiktarim.com/upload/ckfinder/files/josep.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16132100a9ea58---31917891258.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/vufasijuxogosesasaw.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/78334113265.pdfIn PDF document text
    • http://axiomestates.com/userfiles/file/pepejemas.pdfIn PDF document text
    • http://atomicattack.com/atomic/fckimages/file/wurexam.pdfIn PDF document text
    • https://soalmatematik.com/userfiles/file/desidulevuribefugisewap.pdfIn PDF document text
    • http://nemalipics.com/87504791807.pdfIn PDF document text
    • http://www.anglometais.com.br/adm/Editor/ckfinder/userfiles/files/57161458513.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/767652915f59151018fdf4ad0c6be63a/goreradubenijovufotejuga.pdfIn PDF document text
    • http://hangquangauto.com/files/11075031500.pdfIn PDF document text
    • http://byty-pardubice.eu/UserFiles/File/zapirijoju.pdfIn PDF document text
    • http://davobio.com/upload/files/31341366616.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/73698842473.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/a369d0e1d69933ec359eee03721ff969/lujibunabosaged.pdfIn PDF document text
    • http://gamebonda.com/ckupload/files/musalotonumutiponopunerob.pdfIn PDF document text
    • http://maradonasalud.com.ar/ckeditor/ckfinder/userfiles/files/57854349936.pdfIn PDF document text
    • https://dailyiat.com/html_upload/file/pewaxumeritazipegegi.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/631b171081f156c32a21162e45e599ac/77776527139.pdfIn PDF document text
    • http://zhouzhuanx.com/v15/Upload/file/20219172030342531.pdfIn PDF document text
    • http://likuidart.com/files/ckeditor/files/34648269283.pdfIn PDF document text
    • http://telektrans.hu/editor_up/dizakuvebawodet.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_off0000e416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE416 18184 bytes
SHA-256: a945498fc2cad5e08cbd19aea56553ed184ebbec8a09c1770d590f59d26848ed
font_01_sfnt_off0001138b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1138B 10672 bytes
SHA-256: 6d7b9f05f40cd23c2e923b8a13e27e2c54f023daa9ff17c81a8755f48cfd50b1
font_02_sfnt_off00012be7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BE7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.