Malicious PDF — malware analysis report

Static analysis result for SHA-256 8175cad8f7b306f4…

MALICIOUS

PDF

47.4 KB Created: 2020-10-28 04:27:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 8d3ce01ddcbc0908976069a1f79217d7 SHA-1: 1496b959c463addf5bfeda47fde0babf4b34d848 SHA-256: 8175cad8f7b306f48cc128857f42765f84645c2bacc397402db7b60660df5544
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ggtraff.ru/123?keyword=bricks+and+balls+level+469 In PDF document text
    • https://norudajesopoz.weebly.com/uploads/1/3/4/3/134340776/kibawitaguzudo.pdfIn PDF document text
    • https://xigokerurubupa.weebly.com/uploads/1/3/4/3/134312623/1606659.pdfIn PDF document text
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/6110118.pdfIn PDF document text
    • https://xasotuda.weebly.com/uploads/1/3/4/2/134235861/kafejizobaf.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/768e950094bcb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403414/normal_5f98b20c2379b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377912/normal_5f8b2d5f5fe17.pdfIn PDF document text
    • https://pasuzexogisinib.weebly.com/uploads/1/3/4/2/134266431/dujewenasu.pdfIn PDF document text
    • https://tevirilozarenov.weebly.com/uploads/1/3/2/6/132695732/595097.pdfIn PDF document text
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/venerelajiwat_gipapexuxajuda_xupap_setagorimumo.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/povakokuxefos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mudurixo/medical_certificate_format_for_sick_leave_for_employees_download.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/self_esteem_affirmations_louise_hay.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/free_printable_october_2019_calendar.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/vuruseremifenedowifizovef.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/jaxedasimonobo.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/96284360800.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/analytical_reasoning_questions_and_answers_with_explanation_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/alfabeto_italiano.pdfIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/26258240403.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e2db325-c06b-4f53-adba-160159ae64f8/rijasaxusibugelolutefew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/832a4325-0d8b-4fc9-877a-229075713656/kutomaxugadurirofokidezub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47cebef1-c0b6-46a5-979a-80f58a231af1/celebrity_deathmatch_season_1_episode_12.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
    • 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_off000061e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61E0 5644 bytes
SHA-256: 29641271be40ccb23a130eb26919f55dd77ea87533c0bc66576da761c3ab2b1f
font_01_sfnt_off00007523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7523 10916 bytes
SHA-256: c86663e77de314f957e95d6ab71eab28b75b38e59082927c85554b19f75be9d7
font_02_sfnt_off00009918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9918 16196 bytes
SHA-256: 536551dee6876366cf8a5d925709f0aaa9c9f58e9963f4e154d0e8cf77de6ee3