Malicious PDF — malware analysis report

Static analysis result for SHA-256 06e941f8df54e95e…

MALICIOUS

PDF

78.5 KB Created: 2021-04-02 01:44:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: dd09ea0ec811d5e9305ed87346400a8d SHA-1: 371a48c507122f7cf57bca5672a30b3203db2faf SHA-256: 06e941f8df54e95ea727ee66a999a1a3f46aaad208785d882b8307c28a029b59
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains a large number of external links, many of which point to disposable hosting services, indicating a link farm designed to distribute malicious content. The 'SE_BRAND_CREDENTIAL_PHISH' heuristic specifically identifies an attempt to impersonate Outlook and directs users to a redirector URL, strongly suggesting a credential phishing campaign. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://jarubobukifali.weebly.com/uploads/1/3/5/2/135297267/dorozurilazi_jitibutivutar_nilafexez_sediratozixaju.pdf.
  • 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://druttle.ru/award?keyword=financial+accounting+ledger+pdf PDF link annotation
    • https://cdn.sqhk.co/timadupak/gL1V7F3/30363282959.pdfIn PDF document text
    • http://pitikudefojeken.getenjoyment.net/pebevakugibupisifixuve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460473/normal_6060a6b59e1e0.pdfIn PDF document text
    • https://jarubobukifali.weebly.com/uploads/1/3/5/2/135297267/dorozurilazi_jitibutivutar_nilafexez_sediratozixaju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453889/normal_5fdf422fa87b0.pdfIn PDF document text
    • https://takaweso.weebly.com/uploads/1/3/2/3/132302848/nipitinubel.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387417/normal_5fe0f3dd12987.pdfIn PDF document text
    • http://watepavamosem.sportsontheweb.net/29574348545.pdfIn PDF document text
    • http://gejulavofanutar.mygamesonline.org/struktur_apbn_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/vorebilifi/jk4gg6v/milkman_karlson_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/lesebonun/OHjgjeY/airlines_manager_tycoon_2019_hack_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484805/normal_603e3a81642be.pdfIn PDF document text
    • https://cdn.sqhk.co/fovuxugo/ihihYib/30314395947.pdfIn PDF document text
    • https://cdn.sqhk.co/dizoketa/ifjchhR/toy_super_smash_bros_apk_uptodown.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d2d87fd5-5f4d-49aa-ab3c-2263ce4b5d22.filesusr.com/ugd/9169d2_e5ac3e0bb7c74bb2a66fa7b6d4bfac3f.pdf?index=trueIn PDF document text
    • https://724418e0-3ace-43c1-abd8-628b4820fc71.filesusr.com/ugd/6df952_828c474af6f74f08857a01c18baf38c6.pdf?index=trueIn PDF document text
    • http://xiwexuxe.atwebpages.com/lunakubo.pdfIn PDF document text
    • https://5dfb2dbd-6c80-4a99-afab-57dcddd938ef.filesusr.com/ugd/79d40d_8e49b9a345f641a182935c9ab13455fb.pdf?index=trueIn PDF document text
    • https://ab60d57a-1f92-408f-9079-0b325776b613.filesusr.com/ugd/724fb5_68e899b753c64851ab0dc87bf8bddd5b.pdf?index=trueIn PDF document text
    • https://492f55f4-3442-4b37-b17e-39d9f2f0ae8a.filesusr.com/ugd/7dfe85_a9bf65c09d88419281ff3974defe3f2d.pdf?index=trueIn PDF document text
    • https://2225f16e-b6a0-48e2-a067-d7e802b71dd4.filesusr.com/ugd/a7ada4_c5d1a5adf7e048d78fa400ba94d9dbda.pdf?index=trueIn 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_off0000f6b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B2 5100 bytes
SHA-256: 711a5dd8c658e1df35a10d383056aca04845c23d459e0d3fa783c78ee78da825
font_01_sfnt_off0001081f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1081F 10820 bytes
SHA-256: 834df8f0e4ae8d908e209f3eb488cbed7c344fb48ac9f74ac5abbf040fb57d9f