Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a0220ce82823b0b…

MALICIOUS

PDF

110.8 KB Created: 2021-03-24 13:46:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a4af8b2b60774e7aed71425e05182d50 SHA-1: 11f5ec44f57610d9b73bbe3e643324742475de53 SHA-256: 9a0220ce82823b0b960bf7ec059973e8478d530133c74a6f84d0b60fa0b8478b
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/award?keyword=osaka+metro+map+english+pdf PDF link annotation
    • http://nomuvafemokin.iblogger.org/39473448669.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383687/normal_60273a1250092.pdfIn PDF document text
    • http://buyervannakupitvsem.xyz/wisapiwewubopareniwab0bon.pdfIn PDF document text
    • https://cdn.sqhk.co/figotabam/etgdwic/xozok.pdfIn PDF document text
    • http://heymama.store/the_eraser_thom_yorke_sheet_musicpvits.pdfIn PDF document text
    • https://cdn.sqhk.co/ribobujir/il5VywB/72797866920.pdfIn PDF document text
    • http://damodudajipofem.22web.org/netbeans_java_desktop_application_tutorial.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365576/normal_5ffa918fc3b04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369640/normal_601ccadc1d55a.pdfIn PDF document text
    • http://sarkife.site/sutosidogilurcpxap.pdfIn PDF document text
    • http://nely.xyz/62372774978aaj9.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/fgjlqfG/roller_coaster_games_theme_park_rides.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409396/normal_60182be8ec2aa.pdfIn PDF document text
    • http://life-news.tech/zogititobowobafivokerifuzvd3al.pdfIn PDF document text
    • https://cdn.sqhk.co/fosojatesog/dIXZicO/diners_club_ecuador_inversiones.pdfIn PDF document text
    • https://cdn.sqhk.co/faroziwe/gdo7Zis/98558904690.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489241/normal_6021175397a47.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1747caf2-50c5-4ace-8f30-8d3f4e2f7d49.filesusr.com/ugd/017962_0e97510a29f748b78dfba7adeb94a8a3.pdf?index=trueIn PDF document text
    • http://naremijex.epizy.com/porsche_993_buyers_guide.pdfIn PDF document text
    • https://ca30e0e0-ecf2-44ab-b6a2-fe26291458be.filesusr.com/ugd/34e21e_687052597a574fcea51901713e87863f.pdf?index=trueIn PDF document text
    • https://0c7b1e5d-10e9-4c66-9a64-57e6babc74f3.filesusr.com/ugd/6b59ba_737fa4debc7a48ba8ec2c80e35248235.pdf?index=trueIn PDF document text
    • http://jefevuxivux.epizy.com/medotimuwotokadigebazal.pdfIn PDF document text
    • https://7c50ec62-1ece-451b-b03c-4788199016cf.filesusr.com/ugd/635f3c_6674fc539ab448b2b3d1f1f645b81165.pdf?index=trueIn PDF document text
    • https://d38713d8-f9e0-49bf-8e72-3f46774ce551.filesusr.com/ugd/b3faf5_6def26ed77d04ce3b3caa11725299bcb.pdf?index=trueIn PDF document text
    • http://xevotoxukapo.epizy.com/34037778319.pdfIn PDF document text
    • http://fofanab.epizy.com/are_shark_vacuum_accessories_interchangeable.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106CF 34856 bytes
SHA-256: 163fa10cb35d95cd1f33fd627b94e49ec9e877ab7f9c97c1678f8a8c4375297e
font_01_sfnt_off000172b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172B5 5544 bytes
SHA-256: 668a1eb8c2ead41264e019d211c0031a127d049fbb9ec3d94a572698682fcd5a
font_02_sfnt_off00018562.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18562 11364 bytes
SHA-256: e1109c298184c274ba373bff72a33cc9ddfbbdd239cccfb2d1b2e4039d353cd0