Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b0de02bbd280442…

MALICIOUS

PDF

75.8 KB Created: 2021-03-25 16:31:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6a5f44491d404fc6a2f66717d18367fa SHA-1: 9c1cdca98a2f791839c702027c0179c535b5c9f4 SHA-256: 9b0de02bbd28044213fb5893af86d8f601f121114056ba7577906ab7d861e196
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains numerous external links, with one prominent URL pointing to 'kuzutuzo.ru', suggesting a link farm or redirection to a malicious site. The presence of embedded links and the 'SEO_LINK_FARM' heuristic indicate an attempt to drive traffic or downloads, consistent with a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://kuzutuzo.ru/wix?keyword=inca+map+quiz
    • http://xunarepozufuz.mygamesonline.org/how_to_make_poached_eggs_in_a_microwave_egg_poacher.pdf
    • http://zutolewe.mywebcommunity.org/13293924885.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/7ce6ec6c-53f4-4c22-9774-fe4d229a68e8/xunaxusogelivifo.pdf
    • https://s3.amazonaws.com/juzowilipi/white_vs_black_tesla_interior.pdf
    • https://564fd4a8-0e6d-4f97-813a-a14a70c45316.filesusr.com/ugd/f90d28_c5d6e731d100466d83dddd22f20f66e2.pdf?index=true
    • https://s3.amazonaws.com/degagaziv/30144466758.pdf
    • https://s3.amazonaws.com/jenagubadopi/android_toolbar_shadow.pdf
    • http://sitafefisoju.atwebpages.com/members_mark_grill_instruction_manual.pdf
    • https://uploads.strikinglycdn.com/files/12cd1da2-c773-48f2-9736-04b833a85c14/15016306355.pdf
    • https://7ec9ed57-df89-401a-953b-45744c150cee.filesusr.com/ugd/6e3131_704df5ab1624464390a7cd04de93274d.pdf?index=true
    • https://e61e9f85-32c5-4861-9fd4-b89109084c35.filesusr.com/ugd/2e4eb4_827487484b6f42efa5b0273d3ec7e06f.pdf?index=true
    • https://s3.amazonaws.com/ropidadegaxut/lgbt_orientation_list.pdf
    • https://s3.amazonaws.com/zolerazowubow/pan-_africanism_the_idea_and_movement.pdf
    • https://94db4134-5784-44c5-a63d-963e509970fa.filesusr.com/ugd/9c58c5_d94364fc44244e6f8019965dd311792e.pdf?index=true
    • https://93dbb2ad-f1e8-4c6c-adfd-2ef134399473.filesusr.com/ugd/df4650_1545d408b27f4a4eb92cb731e613eb25.pdf?index=true
    • https://3ecb585b-79b8-4502-8567-d9a17299c5c1.filesusr.com/ugd/4b874d_4378d52d6abd41fe8967e7a1f37721f6.pdf?index=true
    • https://uploads.strikinglycdn.com/files/492c47a7-047a-4b75-b745-ee19a08f886d/que_significa_ser_un_lider_proactivo.pdf
    • https://79d86aa2-23c4-4aa0-a0dc-c16ac59ae55d.filesusr.com/ugd/ecb701_3151514d3380407c9649922860061e62.pdf?index=true
    • https://s3.amazonaws.com/saziwijaxodav/domexomoladuvera.pdf
    • https://s3.amazonaws.com/vexosafugunu/poweredge_t330_spec_sheet.pdf
    • https://s3.amazonaws.com/tobaziw/profit_and_loss_statement_template_for_nonprofit.pdf
    • http://kijonag.onlinewebshop.net/calendario_mensual_2020_para_imprimir.pdf
    • https://37bdae34-bb2f-403f-997c-54a7c09d9c06.filesusr.com/ugd/dc98cc_e7c5166cd47d458bb45b816e0d38cd6e.pdf?index=true
    • https://6090ae5c-070c-4b50-bfd2-11a66789f099.filesusr.com/ugd/83cce3_924ac207097544ceab86fd24660dce88.pdf?index=true
    • https://s3.amazonaws.com/zaxawetawupo/22075886322.pdf
    • https://0f939073-77d1-4307-aaa8-42539c8515e3.filesusr.com/ugd/85c9df_b97833833c4441758dc2fce0e4dc5608.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df93.bin
feb5f797122db005abb16a8d2fab1191be60ba3e284ed7885d40636ed88f4fd8
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF93 4460 bytes
font_01_sfnt_off0000ee92.bin
44924121534076f32b2784b1f20506300e6fc91b54eb909d43bf83dc70f032a8
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE92 10960 bytes
font_02_sfnt_off000113e3.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x113E3 4324 bytes