Malicious PDF — malware analysis report

Static analysis result for SHA-256 c78accb277aa5c5d…

MALICIOUS

PDF

83.6 KB Created: 2021-09-10 19:28:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: 35069455aed63c8ac3a87685e6e388f6 SHA-1: 4c212e3eb960668a61c8df2d35b5f04b1fe831f2 SHA-256: c78accb277aa5c5d4e6668dc9fce62adefe00122eed7ef168c87a6320e196b96
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 0.9991

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://oniceh.ru/uplcv?utm_term=minecraft+pocket+edition+download+for+windows+7+free PDF link annotation
    • http://trevorhannant.com/xigiguwo.pdfIn PDF document text
    • http://darstin.com/userfiles/files/7420149694.pdfIn PDF document text
    • http://splogservice.ru/content/file/60536894050.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/tisujebifisamerawekivemov.pdfIn PDF document text
    • http://flairpens.ru/uploads/files/79804611565.pdfIn PDF document text
    • http://htygroup.com/upload/files/pawav.pdfIn PDF document text
    • https://hygradeinsulators.com/images/uploads/file/87736553223.pdfIn PDF document text
    • https://www.sesc-am.com.br/Selecao/ckfinder/files/xetizudokewezemezoluz.pdfIn PDF document text
    • http://henghuitong.com/jingkelun/userfiles/files/20210904021212.pdfIn PDF document text
    • http://huh.hu/UserFiles/File/nulazinedego.pdfIn PDF document text
    • http://akcihlar.cz/userfiles/file/88190679052.pdfIn PDF document text
    • https://ises.smithpressautomation.com/phpsites/vertical_living/uploads/file/darabike.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/2e69e2e9b6a2aaf94dc00f6e37cf873b/zisuferizegoloko.pdfIn PDF document text
    • http://stihoplet.by/upload/editor/files/72560068133.pdfIn PDF document text
    • https://raljob.com/userfiles/file/rolatugofalazamobupob.pdfIn PDF document text
    • https://sitpchemcieszyn.pl/_sitpchem/file/fexixarukenede.pdfIn PDF document text
    • http://benetalent.com/upload/files/zegutufapelub.pdfIn PDF document text
    • http://thesecurityguardunion.ca/userfiles/files/24184640748.pdfIn PDF document text
    • https://easyown.ddproperty.com/datas/files/bipobabukubive.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://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_off0000e0e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0E2 17952 bytes
SHA-256: 3ab40352e616da18c9e009c2e27b7d7e796da4756f1d8a38441afd1210c58c27
font_01_sfnt_off00010f0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0C 10832 bytes
SHA-256: 751a1303fe84accd324d9dfbf6c33fc76314a32ee2a8a8735b191ccce5baa58b
font_02_sfnt_off0001284f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1284F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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