Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8eda8c057339114…

MALICIOUS

PDF

84.3 KB Created: 2021-03-10 02:48:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 36fca2cc9cedd7ae8ceb1022f90c8e22 SHA-1: 566d75e2c48d6e6454802a87fbc0e82e4448332f SHA-256: d8eda8c0573391146b0181ff64c40754749be907d07abedd0118853e41c88c0d
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 0.9996

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://dafemum.ru/aws?utm_term=android+app+development+course+free+by+google PDF link annotation
    • http://epaytds.xyz/gonegedeogeev.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/iidINgf/nulebevigewaziwifofod.pdfIn PDF document text
    • https://cdn.sqhk.co/rawegili/jjdhdig/collocations_make_and_do_worksheets.pdfIn PDF document text
    • http://www19216801.site/bbc_learning_english_lingohacksc9a6.pdfIn PDF document text
    • http://mozodulo.iblogger.org/redis_for_windows.pdfIn PDF document text
    • http://bunnygummy.ru/35618170744ai6mb.pdfIn PDF document text
    • http://peroruse.iblogger.org/prepositional_phrase_worksheet_with_answers_grade_5.pdfIn PDF document text
    • http://good-production20.site/xifujuzusiwilomozifex6qil.pdfIn PDF document text
    • https://cdn.sqhk.co/fovuxugo/oBjjitl/talking_tom_cat_doll_price.pdfIn PDF document text
    • https://cdn.sqhk.co/jirudumom/gcUhbx1/53649278804.pdfIn PDF document text
    • http://nenegifivujaxu.mypressonline.com/dafurebefid.pdfIn PDF document text
    • http://pakunobun.getenjoyment.net/how_to_clean_rubber_water_bottle_mouthpiece.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://770ad53b-b55e-4e58-b1eb-3709f41304f7.filesusr.com/ugd/98e298_026a218fdc3346759ad2020b52bde709.pdf?index=trueIn PDF document text
    • http://gagivipupine.epizy.com/rodofawuresufagad.pdfIn PDF document text
    • http://kilarosine.atwebpages.com/netflix_the_art_of_racing_in_the_rain.pdfIn PDF document text
    • https://45ae50e1-98a8-4501-9ad6-fc0df438eb43.filesusr.com/ugd/b16523_16b6d3fa20664dca8c5afd90b9cfbeee.pdf?index=trueIn PDF document text
    • https://95049c82-e412-4913-a0b0-e03e83d5170a.filesusr.com/ugd/127d6e_39d8e19f5fdf49ad8da0adbd0ce45718.pdf?index=trueIn PDF document text
    • https://dec4a425-646e-450a-80ca-a73a75d058ad.filesusr.com/ugd/ba3095_6e90227a8d394c12bac6d3034aba8cd0.pdf?index=trueIn PDF document text
    • https://c216880a-03a2-4774-ab7e-121c93799e8f.filesusr.com/ugd/b5aed9_b4d973a3f6424ea1b4d90a9ce6f95edc.pdf?index=trueIn PDF document text
    • https://c145ee04-3c3b-4786-8b94-e0511401b322.filesusr.com/ugd/de65f7_b5c885b0c9f341eaa07999c4722ee216.pdf?index=trueIn PDF document text
    • https://c8019651-2137-4367-b38e-775fff3f8a75.filesusr.com/ugd/fc5a02_55c2371104744068927efc8b7bb23645.pdf?index=trueIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0D 5648 bytes
SHA-256: 2cb5b48c91f2d60eb0571adb4f97e67bc22b02b3cb9db1401cb2583e04786634
font_01_sfnt_off00011031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11031 10944 bytes
SHA-256: 21ad4d7054df65a7742e2d797dbfe86a3e76f2f321e39b6046bae29db2466bdd
font_02_sfnt_off00013584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13584 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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