Malicious PDF — malware analysis report

Static analysis result for SHA-256 09e30b43195f585a…

MALICIOUS

PDF

87.9 KB Created: 2021-08-01 20:19:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dbbdb81d094c74f4052e110de6f2ff8f SHA-1: d931ed34869f6b9f88f72a04f25db632dd314396 SHA-256: 09e30b43195f585aa96281c8d47a43d4ab37c5c0914a0809e68a183e6b632f48
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm or SEO manipulation tactic. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of numerous URLs indicates a potential for redirecting users to malicious sites or downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • 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://huntic.ru/uplcv?utm_term=hp+pavilion+beep+codes+3+long+3+short
    • https://mamo-tato.ro/userfiles/file/gaxisemewivugateg.pdf
    • http://agroanaliz.by/upload/editor/files/14873569684.pdf
    • http://secretlove.ch/ckfinder/userfiles/files/xijabowename.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/ln8vrdbn513a2jt40lrif7ln73/76984011401.pdf
    • http://accronline.com/userfiles/file/givelaneputapirokuguleda.pdf
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/ab556fc339522a8d38082d5a633a6d34/90945570914.pdf
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac9f4181fc1---bawagizipurajewifopuvodor.pdf
    • https://pavaniautismschools.com/wp-content/plugins/super-forms/uploads/php/files/bt83ueaqsiv2ookvt7iaqarr79/rojitaladanizapiked.pdf
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d2d4b3b2909---31359310556.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a85be33f2---lidebivibemekoj.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c02c119638b---rifepamofufobodawimekop.pdf
    • http://tsg-vaganovskoe.ru/ckfinder/userfiles/files/jepivijujujosafujig.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c5d0d021094---49415725164.pdf
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/ob6uol2udv2gb9tmsd5tt29t5g/41590255956.pdf
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/194245de6f75a898e6d535ed3fc14c7f/25635471189.pdf
    • https://maturana.cl/upload/file/xogex.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/4189b246697523cc3ca4b9553eaada3d/rufosexajuvupizumuse.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf6c0683f0---33343169520.pdf
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/30cfe6a68f9bb097c2de6642adb134a3/dizib.pdf
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/fc32fcb9b5354604da489b5a37e17fce/13233451574.pdf
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbaf08f3f8e---wajile.pdf
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/ladijubasukuwedisotemaz.pdf
    • http://urgentcarepb.net/userfiles/file/90448619473.pdf
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/596a84214c487a3c772260b8b938ea15/dobakula.pdf
    • 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_off0000f49b.bin
121deedb7fd4f247ce57f34602c80a2c24590a49b478aa7d7a068e2d0b5fa874
pdf-font-stream PDF embedded font (sfnt) at offset 0xF49B 16664 bytes
font_01_sfnt_off00011fea.bin
a41b795e9be89618d5369cfd4ab44205eceec559336ace5c615386be948cdf30
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FEA 11164 bytes
font_02_sfnt_off00013986.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13986 16792 bytes