Malicious PDF — malware analysis report

Static analysis result for SHA-256 9048e029454b0c28…

MALICIOUS

PDF

69.7 KB Created: 2021-09-28 08:38:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ff585e241029f63e587be152b868c073 SHA-1: 3b4c437c3502cc507a76f9ecb0919fadf0ee5edd SHA-256: 9048e029454b0c28b789b9471b94462541038f9c1cf8b00379fa8928ca6fc95e
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a link farm pointing to numerous domains, many of which are associated with compromised CMS uploads or disposable hosting, suggesting an attempt to distribute malicious content or phish users. No scripts were extracted, but the structure and URL patterns are consistent with a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://moveworldtogether.com/datas/files/gadisogisinagep.pdf In PDF document text
    • https://www.akilciilacdernegi.com/ckfinder/userfiles/files/93288912111.pdfIn PDF document text
    • https://hantverksakuten.se/ckfinder/userfiles/files/46612974649.pdfIn PDF document text
    • https://888nv.ru/userfiles/file/65149981086.pdfIn PDF document text
    • https://y3stwk65l-mn9.com/contents/files/fevajigobolotawaliwi.pdfIn PDF document text
    • http://gabinetpro.gabinetpro.pl/kosmetyczka/krakow/files/pezulax.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/161353d8b2fd1c---loxitejopakenikiw.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/0a8d6a6680324c118b91c14d72313bc2/xivokuveximu.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614ef31e7624e---xitoragixenebumar.pdfIn PDF document text
    • http://caffepontoni.com/uploads/file/49936220781.pdfIn PDF document text
    • http://neoneophytou.com/ckfinder/userfiles/files/wodaboxitizuxojunogixuj.pdfIn PDF document text
    • https://bio86.net/userfiles/fichiers/jevexemebal.pdfIn PDF document text
    • https://esterkins.de/ckfinder/userfiles/files/sovejipoxixowi.pdfIn PDF document text
    • https://festival-bg.com/media/ckuploads/files/53492144603.pdfIn PDF document text
    • https://maintogelonline2.bet/contents/files/2535055957.pdfIn PDF document text
    • http://lamardaegu.com/upfile/user/file/22903465748.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/e0c0f1512255c01964c0018d70d2a41f/rasibipuboxonini.pdfIn PDF document text
    • http://tienhasteel.com/app/webroot/upload/files/20565392556.pdfIn PDF document text
    • https://globalybm.com/ckfinder/userfiles/files/1631908465.pdfIn PDF document text
    • http://sakuragiramenandsushi.com/uploads/files/fupajerejivezeduduf.pdfIn PDF document text
    • http://veewood.com/file_media/file_image/file/sixebugawisidal.pdfIn PDF document text
    • http://tourgrodno.by/images/content/file/legug.pdfIn PDF document text
    • http://szilasfood.hu/pic_upload/files/senexojamodekosoraro.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615226399cf9a---48069423095.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+jailbreak+galaxy+s4+activePDF 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_off0000b0a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0A5 14540 bytes
SHA-256: 388e04b0fb2045b6e63adf4a23e6b06377625236e874890d8d0b5679fce719c3
font_01_sfnt_off0000d50b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD50B 11100 bytes
SHA-256: bbe8a7cd917c759c76e442e11ed6118a6ae5d54217684b395f44aa5c5c4bc02b
font_02_sfnt_off0000ef20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF20 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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