Malicious PDF — malware analysis report

Static analysis result for SHA-256 3da78dca13d66949…

MALICIOUS

PDF

74.3 KB Created: 2021-09-20 11:54:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 8f810a95443e3ad5a2ae0b51c6762645 SHA-1: a397e490a72a1583bd3030e9eabd9b647cada87d SHA-256: 3da78dca13d66949f6897fbcfbc7d3e1f03a2bca0c63012a3a6b24387784257f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised websites or disposable hosting, indicative of a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://oniceh.ru/uplcv?utm_term=play+store+ki+history+kaise+delete+karen PDF link annotation
    • https://medius.sk/userfiles/file/vusoxesagaroruvodomegex.pdfIn PDF document text
    • http://edituj.cz/res/file/sibejoba.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/850feb4b2337dba19272118fd498979f/marexupi.pdfIn PDF document text
    • http://sicilalluminio.it/userfiles/files/wamez.pdfIn PDF document text
    • https://jeneifogaszat.hu/cikkdata/files/38446926398.pdfIn PDF document text
    • https://e-room.co/userfiles/file/31056312651.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/pugeneler.pdfIn PDF document text
    • http://unicaconsultoriarh.com/images/files/dagufanawoxiwekapif.pdfIn PDF document text
    • https://tonerihned.cz/userfiles/file/83361183303.pdfIn PDF document text
    • http://karimeh.com/public/userfiles/file/66915923493.pdfIn PDF document text
    • https://afritransport.com/app/webroot/files/file/golenu.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac190db38b---lerakefile.pdfIn PDF document text
    • https://koncnc.com/genelresimler/file/88713118042.pdfIn PDF document text
    • http://swaptoys.org/ckeditor/uploads/files/nodofalituzafupubodexiv.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/xepak.pdfIn PDF document text
    • https://www.hotelrestaurantmacarena.fr/ckfinder/userfiles/files/zawirajukad.pdfIn PDF document text
    • http://wronba.com/uploads/wysiwyg/file/lekavawisiganuzu.pdfIn PDF document text
    • http://28777886.com/Lpf/UPFILE/userfiles/files/24769366980.pdfIn PDF document text
    • http://saraswatishikshamandir.com/singhania/downloads/file/nowuxaranijadaso.pdfIn PDF document text
    • https://highfieldhousehotel.net/nbloom/fckuploads/file/38210853680.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139349f946e6---sewedodab.pdfIn PDF document text
    • https://www.shipgo17.com/plugin/ckeditor/ckfinder/userfiles/files/49447114506.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613b0dec126d9---19321334470.pdfIn PDF document text
    • http://mediedil.eu/userfiles/files/ligukaku.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_off0000ba4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA4A 10552 bytes
SHA-256: 4cef78d14acb7b9db8c2f9f578d46a9fe288fd7ee91c97f6634f5d6b1ef8e80d
font_01_sfnt_off0000d25b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD25B 17992 bytes
SHA-256: e92f439c3813c489c77a35cb385d69523daab47a0c674f0490dc93be7bcad57f
font_02_sfnt_off000101ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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