Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a11c338d7ec7d8a…

MALICIOUS

PDF

57.7 KB Created: 2020-10-19 01:18:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 1f86f7e1f7c45ccc311d294c607d45c7 SHA-1: 68c0673bc8c46b13d3d7ec6fc9ef41ce687e8fb1 SHA-256: 5a11c338d7ec7d8a6ce6f4be381b3678161a45a57e862d104d40b2ecd31da00f
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • 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.
  • 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://ttraff.link/123?keyword=java+design+patterns+explained+simply+pdf In PDF document text
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/be9d745.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/8e42bfb8d1b0f.pdfIn PDF document text
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/024c5.pdfIn PDF document text
    • https://noxepelobisuse.weebly.com/uploads/1/3/1/8/131871648/3765466.pdfIn PDF document text
    • https://wovasemuzusalej.weebly.com/uploads/1/3/1/6/131636629/giradadiniw.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/8ba85efefb.pdfIn PDF document text
    • https://tarirubawapub.weebly.com/uploads/1/3/1/6/131606173/siwivexibajerox-xukiwip-larebefiwosuf-valanobakebik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7969/1168/files/google_image_link.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1964/0738/files/nozafixofetanisukaxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/9331/0631/files/3934721782.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cbdc49a-0b08-4cc7-8e6d-4fb4a600e4c1/15939974561.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/884546f7-3bdd-41f3-829b-a4bf006aa370/55709684158.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15f77657-bddf-4039-b4a3-7c866509973e/zoxujitug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c34fa166-3cc1-44cd-840f-bc51ef2b49ea/kibotogigeneje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9694ae17-9a72-4d2b-8fb8-91a447f49351/3743417900.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20eda08d-87c6-46e8-8c9d-c0c1baa8277f/47871849534.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74ca8215-82bb-450a-89d5-52c5afe7810e/23250573941.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44793be1-871c-44c7-b229-22e808f38e23/60804709283.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2a705a5-b11e-4ffa-b96e-e1ed41b855ab/89615303752.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aca3711-cdb4-4416-8841-3ca883bf776f/terexirajoja.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0963/6512/files/parosogewugofe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3683/0624/files/skam_france_saison_2_episode_2_streaming_vf.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70BD 10524 bytes
SHA-256: 6ec9692b3cffa30d5545aa2143e4a720ad04d8b7981536e15645d260a7e73ba4
font_01_sfnt_off00009374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9374 5256 bytes
SHA-256: c8da06ed9182d28096531bd5e66c464a8b94ba71d6b9a3bb6730aad050c03519
font_02_sfnt_off0000a53f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA53F 10396 bytes
SHA-256: 35f483e3f2c8b49d2a43bb68fa40587be909326fcd9838e13fb53ca03578e7dd
font_03_sfnt_off0000c846.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC846 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230