Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c6fc020f94377f6…

MALICIOUS

PDF

75.6 KB Created: 2021-03-19 13:11:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: cf4c432bd98f27c02a35a4067c6abc81 SHA-1: 11b707ce61ac8a501c0930047da22e6fb2174ea2 SHA-256: 2c6fc020f94377f66985c45c2719534f549fc4adbf143f8544d537a932efd456
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://midufefew.ru/award?keyword=performance+appraisal+system+of+hdfc+bank+pdf PDF link annotation
    • http://suzaxikuzexaw.66ghz.com/kitulofafujopaw.pdfIn PDF document text
    • http://tusalolorow.22web.org/98918440740.pdfIn PDF document text
    • http://govnosiakxws.online/the_difference_between_graphic_novel_and_comic_books7khp2.pdfIn PDF document text
    • http://myfoxing.online/bapametosalipokuneredipi3186v.pdfIn PDF document text
    • http://cetop.xyz/siwavorevogamis45pj.pdfIn PDF document text
    • https://xutezanepone.weebly.com/uploads/1/3/3/9/133999331/veveborenudekiv.pdfIn PDF document text
    • https://vowegokemawo.weebly.com/uploads/1/3/4/3/134353822/eb0e5fafc35c6.pdfIn PDF document text
    • http://milano-moda.space/nexalipitixilunetimic2xcw.pdfIn PDF document text
    • https://tujezagen.weebly.com/uploads/1/3/4/7/134775207/696485.pdfIn PDF document text
    • https://rigitugatelimo.weebly.com/uploads/1/3/4/1/134131632/c44ba1d30721.pdfIn PDF document text
    • https://tujezagen.weebly.com/uploads/1/3/4/7/134775207/dubawag.pdfIn PDF document text
    • http://dk-inc.xyz/alan_wake_american_nightmare_pc_gamek44o6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/26f9b668-f405-42e2-a079-d3f301e729db/apa_itu_1_juz_alquran.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/lejunuxijezuvedu.pdfIn PDF document text
    • http://gidepajujida.rf.gd/adobe_reader_apkmonk.pdfIn PDF document text
    • https://e5b7f393-9b83-42c5-a877-5b85c0c772c8.filesusr.com/ugd/77b42d_33268f9788154645870d0c4a26961172.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sepawi/pogiletafoxezumexejaximew.pdfIn PDF document text
    • https://050a9d39-d8a1-4107-8be8-b2b70b72e454.filesusr.com/ugd/5262df_e832c6081b6f40108981fe2edecb5098.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0523862-f861-4530-827a-c12baa77fda9/50973718818.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/xawugesudo.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/midsummer_nights_dream_summary_act_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e8164c0-a6c3-4779-831c-ecf2450cd846/ms_word_file_format.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acc852fb-354c-4340-859b-e791a88f5aa8/how_to_flash_acer_iconia_tab_a200.pdfIn PDF document text
    • https://s3.amazonaws.com/loxopudizus/informasi_bendungan_katulampa_hari_ini.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9E 5700 bytes
SHA-256: 75371ca9d860a56937f5401e623b4c83c91c6fff591c9a79f5afba5caaa84f08
font_01_sfnt_off0000fed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED3 9904 bytes
SHA-256: 8cbd77448602d6d2b54cdf2d54e6032d230533f4f58b8aa3c88248c2923281a9