Malicious PDF — malware analysis report

Static analysis result for SHA-256 d285601777d7b1d8…

MALICIOUS

PDF

88.1 KB Created: 2021-09-02 05:30:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 0f305302a4695c2d3a9cbd3235aba333 SHA-1: d485a4991f49ed81e53580a98e1717ff027db0ef SHA-256: d285601777d7b1d8c3da26626e9acec1a92c11a0418d95d63ea8f06f8aaa504b
156 Risk Score

Malware Insights

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

The PDF document contains numerous links to other PDF files hosted on various websites, many of which appear to be compromised or disposable. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and unreadable, providing no direct textual clues to its purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://langeline.com/ckeditor/upload/files/xuvazupi.pdf In PDF document text
    • https://osikovo.eu/webroot/img/content/files/82752628743.pdfIn PDF document text
    • http://smartickgroup.com/userfiles/60289473543.pdfIn PDF document text
    • http://mexvp.com/ckfinder/userfiles/files/sobajetimerasax.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160854e5fd5f04---wakireximemo.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/35658695864.pdfIn PDF document text
    • http://gsoutreach.net/clients/e/ea/ea4f28bd0b090870cbed8536b6d1d406/File/62618347400.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/f3990977fd30c8cbfbf40daa489882bb/65923534432.pdfIn PDF document text
    • http://telegid.tv/userfiles/files/fireluwoxuwevidenirewo.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a637881476a---vowowudapixijaf.pdfIn PDF document text
    • https://cancelaria.pl/galeria/file/25899108569.pdfIn PDF document text
    • https://roweryelectra.eu/app/webroot/uploads/file/16219297393069.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/4519185824.pdfIn PDF document text
    • https://jordan.si/dokumenti/file/99374917465.pdfIn PDF document text
    • https://digireg.at/upload/tolowisajidemodut.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/21966935327.pdfIn PDF document text
    • http://studiogiovannone.com/userfiles/files/8388377138.pdfIn PDF document text
    • http://stin-verdon.fr/assets/Image/files/61671514393.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/fererivezomu.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/xefisejutawelotepoba.pdfIn PDF document text
    • https://polnische-zaune.de/userfiles/file/81642335261.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3030ac957---666099002.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/6b7ade2a4e17c86678da138ba38ba385/nataziwupoduw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=irritate+meaning+in+englishPDF 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_off0000d3f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3F0 16192 bytes
SHA-256: 126aabc53b187bc4421529373f04e2f66a11804dfeaeb35cb650b132d56c1dbd
font_01_sfnt_off0000e996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE996 21256 bytes
SHA-256: 2ee2d143ea431eafe7ad7e551b214ff46a23a63cd947faca66418a6abfebe0b0
font_02_sfnt_off000120a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A9 10388 bytes
SHA-256: 4caac703d243ce2ff493f5ea45739ee6826ad46753189f2bbafd3caa17da545c
font_03_sfnt_off000137ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137EA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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