Malicious PDF — malware analysis report

Static analysis result for SHA-256 34fc5d8f4f6b6f9f…

MALICIOUS

PDF

151.0 KB Created: 2021-09-16 04:07:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 49d68c5e34afddd66946a58db1faf0d9 SHA-1: c839d316e45a1767efc52b269b42019f82501e48 SHA-256: 34fc5d8f4f6b6f9f7b54092c5fc3966cea6ca0feadaacf2c11742ff9c638b953
96 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress upload directories, suggesting an attempt to distribute malicious files. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous external URIs indicates a likely attempt to redirect users to malicious content. No scripts were extracted, but the overall structure and heuristic firings point to a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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://ginniglobal.com/uploads/file/vitufor.pdf In PDF document text
    • http://movitecnic.com/ressource/site-image/files/42445293200.pdfIn PDF document text
    • http://er-trans.com/img/produkty/files/zaniwelizevanajede.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/161425fec5460b---46316268526.pdfIn PDF document text
    • https://menu2uplus.com/images/file/tukus.pdfIn PDF document text
    • https://faktxeber.com/resimler/files/50960386617.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/16137c8e0a2eea---gujemad.pdfIn PDF document text
    • http://plise.org/userfiles/file/noropezudavugafobezezirob.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/161305157ab11e---82532499953.pdfIn PDF document text
    • http://sdv.sk/userfiles/articles/file/50548766052.pdfIn PDF document text
    • https://ladangmimpi.com/contents/files/vefukizezijogina.pdfIn PDF document text
    • http://casinodanmarkjackpot.dk/userfiles/file/22337648703.pdfIn PDF document text
    • http://ndc-group.ru/uploads/files/69213287921.pdfIn PDF document text
    • http://architettosirocco.it/userfiles/files/50863278983.pdfIn PDF document text
    • http://swaminarayangm.org/userfiles/file/zidiramorerokaxes.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613fda8c1ea96---39936475960.pdfIn PDF document text
    • http://escrima-rlp.de/userfiles/file/4594919830.pdfIn PDF document text
    • http://studionegro.net/userfiles/files/dajabeguxedevofeg.pdfIn PDF document text
    • http://srs-budapest.hu/uploads/files/kajog.pdfIn PDF document text
    • http://villa-carlshorst.de/sites/default/files/file/56161886907.pdfIn PDF document text
    • http://pjzhengwang.com/upload/file/20210914_171851_154.pdfIn PDF document text
    • https://habibitours.org/ckfinder/userfiles/files/zoteligewilubiguvof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=world+of+darkness+hunter+the+vigil+pdfPDF 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_off0001ecf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ECF2 18204 bytes
SHA-256: 0420c07904ed44444d47cb222187ff4ba538933e3ea53e8d7f9cc4b1f35e7e5c
font_01_sfnt_off00021c4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21C4D 11028 bytes
SHA-256: 03479adef248a695c85c36acbd213de710791c58395f07cacfc36ff28dc63080
font_02_sfnt_off000235b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x235B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1