Malicious PDF — malware analysis report

Static analysis result for SHA-256 d30a9c9903e352af…

MALICIOUS

PDF

87.4 KB Created: 2021-09-16 07:13:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: adbe0a3d5ff77683bbd81156fff9e8af SHA-1: a76a8707dbf440d4d1b821b887edd3911e019532 SHA-256: d30a9c9903e352afbeacfe71754b5f589fc65f82624d0eeaa1bc9d42c3262b74
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm pointing to multiple domains, many of which are hosted on compromised CMS upload storage or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are typical of a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://ingmarcofaedi.com/userfiles/files/13823164137.pdf
    • http://studiolegaletrotta.eu/userfiles/files/rifatigi.pdf
    • http://maiodi.com/userfiles/files/97207976326.pdf
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140fed8a8023---51324917230.pdf
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/or2qf7cii0qogm2nut6gtmk0a7/fejalurefo.pdf
    • http://zhodnoceni-penez.cz/is/images/FCKeditor/File/20100527205.pdf
    • https://www.scmsgroup.org/ckfinder/userfiles/files/lotirute.pdf
    • http://doorsatyrau.com/ckfinder/userfiles/files/48077588192.pdf
    • https://seedomoretravel.com/files/files/73995506814.pdf
    • http://www.almansori-ye.com/almansorifiles/files/16898161082.pdf
    • http://www.catedralirodahaz.hu/data/editorfile/kuzimatu.pdf
    • http://egyptlance.com/userfiles/file/28012217443.pdf
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/32e5f23d50e8531dd82b131f7d796a0f/pekinisezowetomonegawan.pdf
    • http://karat-dobremiasto.pl/userfiles/file/lakujimidisofivagodil.pdf
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ad7685e619---wiwemurutitokisoruwi.pdf
    • http://ghibms.com/userfiles/files/14111671179.pdf
    • https://global-product.org/CKEdit/upload/files/38133767323.pdf
    • http://nicenpos.com/userData/board/file/14542922168.pdf
    • http://jingmingtai.com/filespath/files/20210910230105.pdf
    • http://nbc.ua/design/pic/file/1926533205.pdf
    • http://anais.terminarz.online/kosmetyczka/krakow/files/72796085792.pdf
    • http://wamaeassociates.com/images/uploads/originals/file/ralejobaxeza.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=the+a+team+movie+streaming
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0d7.bin
5a8e0e07742c2f24f527482364da918630d42b00fa5fa790ea0931e02a592f40
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D7 10536 bytes
font_01_sfnt_off000108c0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x108C0 16792 bytes
font_02_sfnt_off000120d2.bin
99ecf2c8c2e39d90bbcc235d619e0298e3df9f21d99d20eaf95796250a542169
pdf-font-stream PDF embedded font (sfnt) at offset 0x120D2 18048 bytes