Malicious PDF — malware analysis report

Static analysis result for SHA-256 38b23256d40f8f27…

MALICIOUS

PDF

77.5 KB Created: 2021-09-11 01:00:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 1208e4886e3771e48a65108fc799ed7a SHA-1: c7a40e3b203975527d1e91fd0c4ccd075fb11bb0 SHA-256: 38b23256d40f8f27c9ce7e5db91848babd8491c24bcdfd9759dbbe65232d5ad6
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 0.9953

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://coretry.ru/uplcv?utm_term=pdf+to+excel+converter+online+free+without+email+unlimited+pages PDF link annotation
    • http://eventclub.pl/userfiles/file/razalinavikit.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/28002048468.pdfIn PDF document text
    • http://bonezi.morefriendship.com/upload/files/26588291669.pdfIn PDF document text
    • http://viral-list-machine.com/ckfinder/userfiles/publics/files/2763029418.pdfIn PDF document text
    • http://miwon.com.vn/app/webroot/uploads/files/ridiranuxed.pdfIn PDF document text
    • http://pro-group.ru/userfiles/files/wuselisilapab.pdfIn PDF document text
    • https://ezgoe.com/10005001208290177/ckfinder/userfiles/files/damewolajoduroliwufij.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd43872022---69166034830.pdfIn PDF document text
    • http://metaglas.kr/userData/board/file/86183589429.pdfIn PDF document text
    • https://ylwlgwadmin.ylwl.cn/upload/files/wusakijetunef.pdfIn PDF document text
    • https://detmers-kontejner.hr/files/55966116393.pdfIn PDF document text
    • http://ferrocom-spb.ru/userfiles/files/17522540620.pdfIn PDF document text
    • https://o-dance.com/upload/files/xukususitumi.pdfIn PDF document text
    • http://lutechmed.com/Images_upload/files/49616862790.pdfIn PDF document text
    • http://studioagm.it/userfiles/files/59098876644.pdfIn PDF document text
    • http://rotarybrescello.it/userfiles/files/98473942937.pdfIn PDF document text
    • http://lrm.mcdonalds.ua/ckfinder/userfiles/files/15450730108.pdfIn PDF document text
    • https://dreamscapes.ca/dream_scapes/userfiles/files/pemulojurew.pdfIn PDF document text
    • http://csigikes.hu/admin/fck_upload/file/98498175678.pdfIn PDF document text
    • http://labellebeaute.com.hk/ckfinder/userfiles/files/76315854506.pdfIn PDF document text
    • http://yokohama-model.com/userfiles/files/mekaduginobo.pdfIn PDF document text
    • http://bestpokeya.com/uploads/files/kegimopinapidepepunakifav.pdfIn PDF document text
    • https://tinnituskozpont.hu/files/61173624696.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_off0000c6a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A0 11420 bytes
SHA-256: 9f73a4614a32979c4829dd8c5597aa66d87c99cd1d8394be86beba4bb8d8b77a
font_01_sfnt_off0000e141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE141 17780 bytes
SHA-256: 4f4129488296e8010084981e97283e502c6a627f224f609afb05201bf68cc123
font_02_sfnt_off00010fe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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