Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a2392c09cd6b3ad…

MALICIOUS

PDF

86.0 KB Created: 2021-07-28 06:46:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 41ff16c53c8546be7f6149450907318b SHA-1: df892c539b5d09ff57bd3a3c83defab3aca9e23a SHA-256: 2a2392c09cd6b3adc2e88d6494f433d28543d290f5878040e18ad35137e675dc
96 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to numerous websites, many of which are hosted on compromised CMS uploads or disposable domains. The ML classifier strongly indicated maliciousness, and the structure suggests an attempt to lure users to potentially harmful content, likely as part of a phishing or malware distribution scheme. No scripts were extracted, limiting the analysis of direct execution vectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 http://logistra.fr/ressource/site-image/files/52246235592.pdf In PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/9soihtoreugegifk4okk3mho05/59977747720.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/6cec2338ed3b94340ce197ae639c6d06/6081032637.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c92bcdd8d78---76878952125.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc94b3a760---60033772625.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/tuzib.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/pasubadexononinidupuz.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607f984320dbb---rekenufed.pdfIn PDF document text
    • http://walkofagesvt.org/clients/0/0e/0e42319052772b195a43ba3ede0f03e0/File/toxajevuk.pdfIn PDF document text
    • https://juraganmonyet.com/contents//files/57883176099.pdfIn PDF document text
    • http://polskienarty.pl/data/aktualnosci_imgs/file/bozovejilolawagozikaxesof.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3235e0544---labobijilotupumaw.pdfIn PDF document text
    • http://bajcsidavidfoto.com/_user/file/nodibiziluvatofetilej.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/ed81e94cd0f1eeb414a787e49298ad2b/44694812683.pdfIn PDF document text
    • http://jrmhandling.nl/upload/file/70640471943.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/8dcef746bfbad6e1401400276b3520e9/74404315377.pdfIn PDF document text
    • https://www.infrascale.com/wp-content/plugins/super-forms/uploads/php/files/78ea1798e29367d607b90848a1f0737d/juzixejurapakigitu.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce876c195d3---jewulidirapik.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/83569429c1f5ed69dca463243ffb5e8b/21019544896.pdfIn PDF document text
    • http://tajeer.co/userfiles/file/fekita.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16077d7cd87879---64758736234.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fb4e6252080---xufule.pdfIn PDF document text
    • http://ashioke.com/images/library/File/78303720323.pdfIn PDF document text
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/58987132450.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=alicja+w+krainie+czar%C3%B3w+pdf+za+darmoPDF 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_off0000e429.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE429 19724 bytes
SHA-256: d173ba3df22b396e0dec660e60890435a5ba2a178c82394fbc9df11e40f10ae5
font_01_sfnt_off000115e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115E2 11004 bytes
SHA-256: f1dd8b3f5b3c0fb00ebab4f0814e176a05037ab9aea9b98040adf2791765c108
font_02_sfnt_off00012f33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1