Malicious PDF — malware analysis report

Static analysis result for SHA-256 32fde07d96d5a7d2…

MALICIOUS

PDF

95.5 KB Created: 2021-09-16 08:19:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 70e7f578115f3f4dfe3f7f99febd2a95 SHA-1: d7f4f9f826947170f7194d320697a56b3401dd87 SHA-256: 32fde07d96d5a7d2803993fd5978c1669c56ab48d91c757e7093fdd1cc838cb6
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicative of a link farm designed to redirect users. ClamAV and ML classifiers strongly indicate malicious intent, likely phishing or malware distribution. The document body is unreadable, but the heuristic firings and URL analysis suggest a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://cafesezony.ru/fck_editor_files/files/juvufoguwofuwunelolinuj.pdf In PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/53339858394.pdfIn PDF document text
    • https://jnvhardoi.org/ckfinder/userfiles/files/68109901112.pdfIn PDF document text
    • http://saikunghouse.hk/userfiles/noxawuvuxo.pdfIn PDF document text
    • http://flooroverstock.com/admin/userfiles/file/83942573265.pdfIn PDF document text
    • https://caror.hu/ckfinder/userfiles/files/78083459901.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f0cfe5c85a---pokeladigel.pdfIn PDF document text
    • http://www.gdchgs.com/admin/img/files/sinudulawiwamepibab.pdfIn PDF document text
    • https://matfplayer.com/calisma2/files/uploads/23180392517.pdfIn PDF document text
    • http://tienphat.vn/imagesflashupload/file/vatiwanizesikekinade.pdfIn PDF document text
    • https://edubox.mn/uploads/users/0/files/50591946617.pdfIn PDF document text
    • http://hotelborgodeipoeti.com/userfiles/files/94768657632.pdfIn PDF document text
    • https://curewelldiabetes.com/userfiles/file/91903706305.pdfIn PDF document text
    • http://sro52.ru/uploads/files/53861708603.pdfIn PDF document text
    • http://industrialsupplies.pk/userfiles/files/99158105752.pdfIn PDF document text
    • https://jetaime-shop.dvsportbg.com/files/3547561435.pdfIn PDF document text
    • https://g4m3s-4p1-12s1.com/contents/files/76372676370.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/18044340535.pdfIn PDF document text
    • https://rosenstein.lu/userfiles/files/reruxudumazolelenajovu.pdfIn PDF document text
    • https://optimumquestsolutions.com/ckfinder/userfiles/files/7593881635.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1613d1182ca32b---zesavevo.pdfIn PDF document text
    • https://madeinstlucia.com/userfiles/files/7759472844.pdfIn PDF document text
    • http://aaz.sk/editor_uploads/files/lodijinuwazusolaw.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/161410344bbe0b---rotikuputikerubasaxivaxek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=go+ara+moviesPDF 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_off0001147c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1147C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012c93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C93 10124 bytes
SHA-256: b694a66c33324cae0ad683a72d47c8c8550d18e6d4ac976f91bb9e925b8a2ae5
font_02_sfnt_off0001433c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1433C 17456 bytes
SHA-256: 0d41c099f76793e81cd35f61faf1841975aa320ec4fb63a99afc5bc3c7acc55b