Malicious PDF — malware analysis report

Static analysis result for SHA-256 74c93017e89c7eef…

MALICIOUS

PDF

79.5 KB Created: 2021-04-03 20:54:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 75b59b98d49bced9b78f126ce8703353 SHA-1: 10fe256ea7461f1d69484285d59bbb0da231ebac SHA-256: 74c93017e89c7eef865ad47ec028bed59ed9623d3df1349aec41358e474b2f84
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 0.9944

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/strik?utm_term=design+your+own+xbox+one+controller+australia PDF link annotation
    • http://wigobike.sportsontheweb.net/xusob.pdfIn PDF document text
    • https://cdn.sqhk.co/fasotaluvose/difhjja/spiral_jetty_meaning_robert_smithson.pdfIn PDF document text
    • http://zafuwozemupojaw.22web.org/top-down_network_design_steps.pdfIn PDF document text
    • https://rubajamepufukav.weebly.com/uploads/1/3/4/4/134432722/2f4fb6f2fdd24.pdfIn PDF document text
    • http://tepafuvofes.iblogger.org/26640499578.pdfIn PDF document text
    • https://derikuboxema.weebly.com/uploads/1/3/0/7/130776504/5628871.pdfIn PDF document text
    • https://cdn.sqhk.co/genizataxom/FjibPid/zuxavoribad.pdfIn PDF document text
    • http://siwosupegejolop.medianewsonline.com/baxibegigokexanenaz.pdfIn PDF document text
    • https://zunenevalomedo.weebly.com/uploads/1/3/4/8/134855990/8948559.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/ehijcTn/73092482813.pdfIn PDF document text
    • http://kivabixedopat.22web.org/pictionary_game_cards.pdfIn PDF document text
    • https://cdn.sqhk.co/kedezoge/91xMdhj/airtel_mobile_recharge_data_pack.pdfIn PDF document text
    • https://cdn.sqhk.co/baxafapunubi/OEKWPgj/62494711698.pdfIn PDF document text
    • http://xoroketogejuxe.mywebcommunity.org/singer_esteem_ii_bobbin_case.pdfIn PDF document text
    • http://nibakelenixezas.getenjoyment.net/76809746285.pdfIn PDF document text
    • http://mitazaxajawusef.22web.org/12759572454.pdfIn PDF document text
    • http://busenefodo.22web.org/gojigalinurugen.pdfIn PDF document text
    • https://vupimovijuxupef.weebly.com/uploads/1/3/4/3/134354147/def137c2d359.pdfIn PDF document text
    • http://matemepujibad.scienceontheweb.net/how_to_make_bookmarks_in_adobe.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://80f75f89-a1e3-4611-a0ef-7a704eb82da9.filesusr.com/ugd/0286dd_e14118b0666f456eaaba0946b60a1f15.pdf?index=trueIn PDF document text
    • https://5057b38b-f250-4925-a5fd-2dbc054a2c1f.filesusr.com/ugd/25ee37_a29e274837e44d2d91a24ec35acdf451.pdf?index=trueIn PDF document text
    • https://af431a04-9ebc-4ea4-a98d-45e4ffbfad14.filesusr.com/ugd/485053_834737d6edeb4f61aca38d336e711c71.pdf?index=trueIn PDF document text
    • https://5d94d51b-2702-4b64-8df3-eadd022f3edc.filesusr.com/ugd/2ddd39_e18deb8eace847df9c29bb2388a6f156.pdf?index=trueIn PDF document text
    • http://waruzav.epizy.com/what_does_walter_symbolize_in_a_raisin_in_the_sun.pdfIn PDF document text
    • https://9387bd13-3746-4408-b474-2867f26e464d.filesusr.com/ugd/ace02d_38055f4c91874c30bfece58ba053c019.pdf?index=trueIn PDF document text
    • http://wemazepiba.epizy.com/sakebemobizojugojaka.pdfIn PDF document text
    • http://risuveliki.rf.gd/cateterismo_vesical_femenino.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_off0000ef2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF2C 1528 bytes
SHA-256: c32a15e5a7d0204937028b1a63ddda85aa7c6b4fe7eb90504d81ca0a4f22b2eb
font_01_sfnt_off0000f6f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F4 5368 bytes
SHA-256: 4d4b434062973f8ce3c3cff045b38f1dd2b400594a0b796cef66d922249ad1ab
font_02_sfnt_off0001096d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1096D 10504 bytes
SHA-256: 413af89b7bc65140115028bb313409afee12c6ca5385f2f8c1a61ef81e351fb6