Malicious PDF — malware analysis report

Static analysis result for SHA-256 f742b8eab1f88109…

MALICIOUS

PDF

80.5 KB Created: 2021-09-15 00:49:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 549225b9185ed19112d9dba3f961449d SHA-1: 8542e18acb5fe40fc211e8810b13f1edaf009370 SHA-256: f742b8eab1f881097322520f1f1ce5773b0e3f77350e83caf8e272debd7bf041
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to compromised CMS upload storage and disposable hosting sites, likely to facilitate the download of further malicious content. The presence of a visual download button lure further supports its role in a phishing or malware distribution workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://oniceh.ru/uplcv?utm_term=love+ni+bhavai+full+movie+download PDF link annotation
    • https://aurorabersinar2.com/contents/files/rixolekagem.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16140e82931c8c---duzowavupin.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/161411454c62c7---tisonaze.pdfIn PDF document text
    • https://spandoekland.nl/userfiles/file/21069081719.pdfIn PDF document text
    • http://colokit.thienlonggroup.com/Images_upload/files/222201000.pdfIn PDF document text
    • http://wwm-quanta.com/upload/files/dalonesux.pdfIn PDF document text
    • https://www.solucionaesp.com/ckfinder/userfiles/files/39674906593.pdfIn PDF document text
    • https://www.sophrologue-nimes.fr/upload/news/files/22853333878.pdfIn PDF document text
    • http://mrpokedb.com/uploads/files/zewidepebedijozu.pdfIn PDF document text
    • https://lighthousemacau.com/html_upload/file/97346149832.pdfIn PDF document text
    • http://tunesistudio.eu/userfiles/files/mewusudupoxojo.pdfIn PDF document text
    • https://siangyun.com/upfiles/editor/files/20658039809.pdfIn PDF document text
    • https://interference.ajoda.eu/userfiles/files/15078963503.pdfIn PDF document text
    • http://bbpcosmetics.com/admin/upFiles/2021-9/file/pilunutabur.pdfIn PDF document text
    • http://architettosirocco.it/userfiles/files/kumikosanomazadoripulava.pdfIn PDF document text
    • https://www.asoriofrio.org/ckfinder/userfiles/files/rijizifikabonoz.pdfIn PDF document text
    • https://lenaoyunlar.com/calisma2/files/uploads/83668007542.pdfIn PDF document text
    • https://istanbulbalbir.com/upload/ckfinder/files/jinabibarir.pdfIn PDF document text
    • http://esen.life/userfiles/file/35286397347.pdfIn PDF document text
    • http://nickelsgrafikdesign.de/ckfinder/userfiles/files/bulilojekade.pdfIn PDF document text
    • http://marathon-gexin.com/Uploadfiles/files/28938733973.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/tj2ivgi29fuq0kp8kbt4shj64a/jepajemope.pdfIn PDF document text
    • https://budgetparking.ca/admin/uploads/file/14581998528.pdfIn PDF document text
    • https://weyergans-hcc.lv/userfiles/file/96992976424.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_off0000d70e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD70E 17620 bytes
SHA-256: 97e3ab23c33d65e68b07ef574fbf40eeba3a0be4b8658ec607beda3721c5012a
font_01_sfnt_off0001048f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1048F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA6 10600 bytes
SHA-256: 395cff27fa35aad7eb83d8e5e517664ecee97609ba96969f7c4d7fb26f0456ab