Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed249b160d2eed9d…

MALICIOUS

PDF

87.4 KB Created: 2021-09-05 19:34:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0e92c1fd8d7ef86ab2dbe15fbfc1aee1 SHA-1: 900699dbf0d66046ea2f7594c0e80b1801d33ebc SHA-256: ed249b160d2eed9d5ebecd70ff5d205581dce8031ebbf9b74e23783faaaa282b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to compromised WordPress upload directories and other disposable hosting sites, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the URLs and the PDF structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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://toshiba-center.ru/uploads/files/ditegujilalikikomivu.pdf In PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160f48efed67c4---3054818298.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/kenaresobizuke.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/514ea3c6c51474178b9d95241423db70/45428952264.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/g22acf0uoausldb944q5h5mp11/buseliwoduvevobigerex.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/mf5p8ireo2ltoj1qebkjqh40cc/xomupavamo.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a444c817e0a---16278840850.pdfIn PDF document text
    • http://odessahighschool1970.com/clients/7/70/70263b1be1b93b62200e198143f59f20/File/91230574080.pdfIn PDF document text
    • https://evg-prague.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bf28de7ec0d---lakak.pdfIn PDF document text
    • https://tepihtrava.rs//files/9090552461.pdfIn PDF document text
    • http://10glazsikeyrosa.ru/file/vuvotufajujolonuzaf.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a68406c757d---81311044853.pdfIn PDF document text
    • https://bimstudioinc.com/media/files/bagupazexudetisat.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/49fbbcb60900e0ebb4b13f3f9a9a2a06/67210239525.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c23840cadc6---wibow.pdfIn PDF document text
    • http://meyergarden.com/ckfinder/userfiles/files/pejukugemafijotodi.pdfIn PDF document text
    • http://rulife.ru/ckfinder/userfiles/files/2933752559.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/nka8mqmip82sfr91si1id4fq93/88499926702.pdfIn PDF document text
    • http://abworder.com/uploads/files/35795619170.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a3a3ccd5102---timisuvotitosutale.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608237564f6b6---kupal.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607673990440f---1720629157.pdfIn PDF document text
    • http://magendans.com/imagefiles/file/86232369400.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=double+lineup+questions+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB01 16448 bytes
SHA-256: 0e4cde3d5bdd5452960de995a4807c8da4ec665155a9812e2f8e54e6c49b7878
font_01_sfnt_off0000f1d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D6 17716 bytes
SHA-256: b7986286273e26db39ee2339e806dbabcd1639337dcda92178164a0dd35bd04e
font_02_sfnt_off00011f76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F76 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001378d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1378D 10616 bytes
SHA-256: a8c373314e25a0d1ad72ea3d4f4b9fdaae924c47c93052350e528bf6c04b0807

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