Malicious PDF — malware analysis report

Static analysis result for SHA-256 9aeae8250845c973…

MALICIOUS

PDF

72.9 KB Created: 2021-09-25 05:58:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2018aaa70e4c8f048a6f0c6403657faa SHA-1: 5699f6149966ea2c1bf295a2a5952929b2ac35e0 SHA-256: 9aeae8250845c97398fa58c78c11ca15605d44045354a16cf096865e1189e300
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to directing users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://aqs-group.it/userfiles/files/kukikamapod.pdf
    • http://arablift.net/userfiles/file/zumedumidoxeme.pdf
    • https://sharkovinkom.com/sharkovinkom.com/ckfinder/userfiles/files/83989257565.pdf
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614351af8cabd---nefokogovefofemegido.pdf
    • http://aaaexpressheating.com/userfiles/file/52868967834.pdf
    • http://buyyoutubecomments.com/ci/userfiles/files/zudidubejajimif.pdf
    • http://kartywspomnien.pl/uploads/assets/file/lafupowezekumolasesalane.pdf
    • https://profix.fr/ckfinder/userfiles/files/80024497202.pdf
    • http://www.socfertenviron.org/cmsfile/contentfiles/nanagaku.pdf
    • https://pasationtravellers.com/root/FCKeditor/file/70273824000.pdf
    • http://poiskvod.ru/images/file/27245836406.pdf
    • http://marcth.pl/media/fck/file/99215218004.pdf
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/f50e182d2830c47aaf8f6d9f29b9a34c/jefavigaju.pdf
    • http://ersatzmonitor.de/userfiles/file/zoragowuzadi.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1614141dbbc3c7---velulafuravijalezafedufo.pdf
    • http://gilendor.cz/userfiles/file/37417579722.pdf
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cab9ecf8fb---fijuwegeteruvowegude.pdf
    • http://avandcie-energy.fr/ckfinder/userfiles/files/96390715502.pdf
    • https://apz-arte.com/ckfinder/userfiles/files/26655356841.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614e7fd4d8b4e---veritek.pdf
    • https://eetravel.net/file/zoletijowoj.pdf
    • https://designsdubaiukfashion.com/userfiles/file/15883852618.pdf
    • https://weldingportal.it/userfiles/file/20737768883.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+see+someone+photos+on+instagram+private+account
    • 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_off0000b4ca.bin
a013d8b377f7edddd670c57eed1220e4fecdd97eecfea9d8621483e05f74693a
pdf-font-stream PDF embedded font (sfnt) at offset 0xB4CA 11016 bytes
font_01_sfnt_off0000ce40.bin
a447ee4b50b2a6baa13dccba883199e662ef76b03b7b2b1e271c3157a1d12e82
pdf-font-stream PDF embedded font (sfnt) at offset 0xCE40 17588 bytes
font_02_sfnt_off0000fb47.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB47 16792 bytes