Malicious PDF — malware analysis report

Static analysis result for SHA-256 059b984917c33683…

MALICIOUS

PDF

73.6 KB Created: 2021-06-02 21:15:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: e73f21cd7fa524c2ef2f687f5ff846a3 SHA-1: 9f968189cf48e609de3dbf150493a60b06f211b1 SHA-256: 059b984917c33683b50539406a9a06631468d73d7804b164e4982ececf664c2e
186 Risk Score

Malware Insights

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

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 0.9993

Heuristics 6

  • 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 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.
  • 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://drafthe.ru/pbw?utm_term=what+is+the+moral+story+of+les+miserables PDF link annotation
    • https://basexexax.weebly.com/uploads/1/3/4/3/134308464/tamajado.pdfIn PDF document text
    • https://sozetodu.weebly.com/uploads/1/3/4/2/134265488/zinejovu.pdfIn PDF document text
    • https://pabarasoziraw.weebly.com/uploads/1/3/5/3/135324669/570435.pdfIn PDF document text
    • https://kunipasufit.weebly.com/uploads/1/3/0/8/130874165/bosubagazuvanibed.pdfIn PDF document text
    • https://dovejopizodumu.weebly.com/uploads/1/3/4/8/134883147/zizamotupasir.pdfIn PDF document text
    • https://tafujopebipa.weebly.com/uploads/1/3/0/7/130774972/tugozigin.pdfIn PDF document text
    • https://rewiwolidinagi.weebly.com/uploads/1/3/4/4/134481042/79b92e5829.pdfIn PDF document text
    • https://derivasip.weebly.com/uploads/1/3/1/4/131407068/vixivaf.pdfIn PDF document text
    • https://jepusujejo.weebly.com/uploads/1/3/4/5/134598091/zovokewibikijebubup.pdfIn PDF document text
    • https://dunawotota.weebly.com/uploads/1/3/1/4/131438316/kudiduguvi.pdfIn PDF document text
    • https://ladozazewuse.weebly.com/uploads/1/3/4/0/134095850/dadafemakavo.pdfIn PDF document text
    • https://nijubalalo.weebly.com/uploads/1/3/1/4/131453980/gefisuzalimewu_gizuzuwokexe_sabatapojani.pdfIn PDF document text
    • https://setivegubuwo.weebly.com/uploads/1/3/4/4/134446573/5315947.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/6a31c419-3fdb-4b75-8406-659679960948/what_ancient_civilization_lasted_the_longest.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01ea230f-ebdf-4e89-b410-b9cc7ecbca6e/37659061979.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0876d90c-a98b-46a1-b7f8-0faf533c3ac2/geometry_polygons_worksheet_answers.pdfIn PDF document text
    • http://lekipirunezi.pbworks.com/f/42980035745.pdfIn PDF document text
    • http://pupowivala.pbworks.com/f/vajaminegadamanajat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64a0b0a2-1ed4-4189-8fa6-c23106976487/89163625531.pdfIn PDF document text
    • http://mejigulo.pbworks.com/f/40603884010.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1938684-d712-4f9f-bc80-3e787a5b5ff2/dadogubewekomipegobuxiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d1b2a3b-2b6c-4a40-a95a-2cf4cda39a7a/free_cissp_exam_questions_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/319de2c0-a9ab-4a66-b08b-a932582431b2/passport_size_photo_uk_free.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_off0000e122.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE122 5260 bytes
SHA-256: e5c15e3ce29c3771cf3d5d6efa632a22397e4c31eca70ccd34f61165cb9ea04f
font_01_sfnt_off0000f2f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F0 10584 bytes
SHA-256: 03e43802cf5a87690376398641a2249c1f73260df86de8a63e83ab559d584f86