Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a7df92c08298050…

MALICIOUS

PDF

76.4 KB Created: 2021-09-18 01:05:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: ecc42599da9deb7425bcfe6c50dce857 SHA-1: 3060bea4de113db15fdc2413bf686f52f4d40969 SHA-256: 0a7df92c08298050c2f390f7deec63094c30b9ff8eb88535e3326c83271c040c
116 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress upload directories, suggesting a link farm designed to host and distribute malicious files. The ML classifier strongly indicated maliciousness, and the presence of PRC/3D content is a known technique for obfuscation in malicious PDFs. No scripts were extracted, but the link farm structure is sufficient to infer a malicious intent to lure users to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

Heuristics 6

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/16139285295058---nevarosizimiwibizonifebof.pdf In PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/161385bbd366a9---19842342887.pdfIn PDF document text
    • http://aptekadc.pl/userfiles/userfile/zuforariwo.pdfIn PDF document text
    • https://arch.ua/ckfinder/userfiles/files/32534644263.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1614502c962ded---demasiwonoga.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/27487008327.pdfIn PDF document text
    • http://elverum-revmatiker.no/images/file/53015506283.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/noloter.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143420606c2f---kijaj.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/misukidosuxu.pdfIn PDF document text
    • https://hotnewsmd.deca.md/upload/userfiles/files/41012629988.pdfIn PDF document text
    • https://onecre.com/images/content/files/xikobogevivutozar.pdfIn PDF document text
    • http://kondicionery-lubertsy.ru/upload_picture/file/tegepudavivezaperujixape.pdfIn PDF document text
    • http://computer-rudolstadt.de/upload/file/27299263614.pdfIn PDF document text
    • https://myphambambi.com/webroot/img/files/patupesajerikonujopalolix.pdfIn PDF document text
    • http://robwalker.net/fckupload/file/setibovojojuzisakazaf.pdfIn PDF document text
    • https://swift-tw.com/lcc/upload/files/29031076110.pdfIn PDF document text
    • http://tfforming.ru/d/files/tewowamunamekadudoxoper.pdfIn PDF document text
    • https://blsautomation.com/ckfinder/userfiles/files/wuraro.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/161376d0512bc9---12265840028.pdfIn PDF document text
    • http://britishcytology.org.uk/ckfinder/userfiles/files/67599182080.pdfIn PDF document text
    • http://motopujcovnateplice.cz/userfiles/file/64830978132.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1613249f3a8fc3---silajizenogifudawuvuji.pdfIn PDF document text
    • https://bonaparte.cappencms.com/templates/files/gijusikazok.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161416e365b96e---bawapatotu.pdfIn PDF document text
    • https://hobbes-group.com/upload/files/14532588307.pdfIn PDF document text
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/1613db6e4b208c---tikupu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=pubg+pc+apk+downloadPDF 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_off0000c57b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC57B 18220 bytes
SHA-256: 376276cf5ba9bd4578cc82bbe63d29ea7301331fa2e286dd6fe599e32bf31cbe
font_01_sfnt_off0000f469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF469 10516 bytes
SHA-256: cfe98d6a051075d455272285acb2700125441ae6069eb5b957a0697903e23ddd
font_02_sfnt_off00010c19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C19 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.